Jolan Walter is a Pediatric Allergy and Immunologist in St Petersburg, Florida. Dr. Walter is rated as a Distinguished provider by MediFind in the treatment of Infantile Neutropenia. Her top areas of expertise are Severe Combined Immunodeficiency (SCID), Primary Immunodeficiency (PID), Infantile Neutropenia, and Common Variable Immune Deficiency.

Jennifer Leiding, M.D., is associate director for clinical research in the Johns Hopkins All Children’s Institute for Clinical and Translational Research and assistant director of the Center for Cellular and Gene Therapy in the Johns Hopkins All Children’s Cancer & Blood Disorders Institute. She is also an associate professor of pediatrics (pending academic review) based on the St. Petersburg, Florida, campus in the Johns Hopkins University of School of Medicine. Dr. Leiding, whose clinical specialty is allergy and immunology, focuses on strategic growth of, and mentorship in, clinical research and early-phase trials campus-wide, as well as cellular and gene therapies for cancer and blood disorders. Her personal line of research and national leadership focuses on cooperative multicenter studies of primary immunodeficiency diseases, including chronic granulomatous disease (CGD) and other rare diseases in children. She returned to Johns Hopkins All Children’s in 2024 after previously serving on the faculty at the USF Morsani College of Medicine and the medical staff of All Children’s for nearly a decade. In between, she worked as a medical director at a gene therapy-focused biotech company. Dr. Leiding earned her medical degree from USF before training there as an intern and resident in pediatrics. She completed her clinical and research fellowship in both allergy and immunology at the National Institute of Allergy and Infectious Diseases. Dr. Leiding is rated as an Advanced provider by MediFind in the treatment of Infantile Neutropenia. Her top areas of expertise are Chronic Granulomatous Disease, Primary Immunodeficiency (PID), Severe Combined Immunodeficiency (SCID), and Clouston Syndrome.

Dr. Sriaroon is the medical director of the outpatient USF Allergy/Immunology clinic at Johns Hopkins All Children’s Hospital and the director of the USF Pediatric Allergy/Immunology fellowship training program. She is also the medical director of the Johns Hopkins All Children's Food Allergy Clinic. She is an associate professor of internal medicine and pediatrics at the University of South Florida (USF) Morsani College of Medicine. Dr. Sriaroon sees patients with various allergic and immunologic conditions and teaches medical students, residents and fellows. She has been invited to give presentations nationally and internationally. Her clinical and research interests include food allergy and primary antibody immunodeficiency. She has authored several peer-reviewed articles and has ongoing clinical trials on food allergy and immunoglobulin therapy. Currently, Dr. Sriaroon serves as USF site director of Food Allergy Research & Education (FARE) Clinical Network. Dr. Sriaroon received her medical degree from the Chulalongkorn University in Thailand. She completed her pediatric residency at Mount Sinai Hospital in Chicago and a fellowship in allergy/immunology at USF. She joined the faculty at USF and the medical staff at Johns Hopkins All Children’s in 2009. Dr. Sriaroon is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. Her top areas of expertise are Food Allergy, Asthma, Common Variable Immune Deficiency, and Primary Immunodeficiency (PID).

Dr. Chellapandian is the division chief of blood and marrow transplant and specializes in bone marrow transplant as a hematologist-oncologist and serves as Director of the Center for Cell and Gene Therapy for Non-Malignant Conditions (CCGNC) in the Johns Hopkins All Children’s Cancer & Blood Disorders Institute. He joined the hospital staff in 2017. Dr. Chellapandian earned his medical degree from Madurai Medical College and then trained at Postgraduate Institute of Medical Education and Research, both in India. He completed a residency in pediatrics at Albert Einstein Medical Center in Philadelphia. Dr. Chellapandian completed a pediatric hematology-oncology and bone marrow transplantation fellowship at Hospital for Sick Children/University of Toronto and an advanced fellowship on bone marrow transplantation and cellular therapy at St. Jude Children’s Research Hospital in Memphis, Tennessee. Dr. Chellapandian's clinical and research interests include hematopoietic stem cell transplant for primary immunodeficiency, immune dysregulation disorders, sickle cell disease, thalassemia, and treatment of histiocytic disorders. He has special focus on ex-vivo graft engineering techniques and autologous gene therapy. He has adapted new methods of T- cell depletion using haploidentical transplantation to transplant patients lacking a suitable matched donor. He has numerous scientific papers and review articles published in this field. Dr. Chellapandian is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. His top areas of expertise are Severe Combined Immunodeficiency (SCID), Non-Langerhans-Cell Histiocytosis, Infantile Neutropenia, Reticulohistiocytoma, and Bone Marrow Transplant.

Alfred Asante-Korang, M.D., F.A.C.C., pediatric cardiologist with the Johns Hopkins All Children’s Heart Institute, has been working with heart transplant patients for more than 20 years. Dr. Asante-Korang was named Johns Hopkins All Children’s Hospital best consulting physician in the 2023 Johns Hopkins Medicine Clinical Awards. Dr. Asante-Korang graduated from the University of Ghana Medical School, where he also completed an internship in pediatrics. He completed pediatric residencies at the University of Liverpool and the University of Chicago, as well as fellowships in pediatric cardiology at the IWK Children’s Hospital in Halifax, Nova Scotia, Canada and the Children’s Hospital of Pittsburgh. Dr. Asante is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. His top areas of expertise are Infantile Neutropenia, Heart Failure, Cardiomyopathy Due to Anthracyclines, Cardiomyopathy, and Heart Transplant.

Dr. Foxworthy is a hematologist-oncologist in the Johns Hopkins All Children’s Cancer and Blood Disorders Institute. She joined the hospital staff in 2024. She sees patients at the hospital’s main campus in St. Petersburg, Florida, and at Outpatient Care, Tampa. She earned her medical degree from Mercer University School of Medicine in Macon, Georgia. She completed her internship and residency in pediatrics at University of Alabama at Birmingham, followed by a fellowship in pediatric hematology-oncology at University of Alabama at Birmingham. She also earned her Master of Science in Public Health with a concentration in outcomes research from University of Alabama at Birmingham School of Public Health. Dr. Foxworthy is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. Her top areas of expertise are Infantile Neutropenia and Immune Thrombocytopenic Purpura (ITP).

Dr. Booth specializes in bone marrow transplant as a hematologist-oncologist at Johns Hopkins All Children’s Hospital in St. Petersburg, Florida. She joined the hospital staff in 2023. She earned her medical degree at Nova Southeastern University College of Osteopathic Medicine in Fort Lauderdale, Florida. She completed her residency at University of Florida, College of Medicine-Jacksonville and Wolfson Children’s Hospital in Jacksonville, Florida. She then completed a fellowship in pediatric hematology-oncology, followed by a fellowship in pediatric hematopoietic stem cell transplant, immunotherapy, at Phoenix Children’s Hospital and University of Arizona, College of Medicine-Phoenix. Dr. Booth is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. Her top areas of expertise are Severe Combined Immunodeficiency (SCID), Infantile Neutropenia, Immune Thrombocytopenic Purpura (ITP), and Bone Marrow Transplant.

Dr. Chandler is chief of the Division of Pediatric Surgery and the Pediatric Surgery Fellowship Program Director at Johns Hopkins All Children’s Hospital. She joined the medical staff in 2008, became interim chief in 2020 and was named full-time chief in 2021. She also is an associate professor of Surgery at the Johns Hopkins School of Medicine. Dr. Chandler’s clinical and research areas of interest are minimally invasive surgery including pectus excavatum, and pediatric cancer surgery. She is a member of the American College of Surgeons. Dr. Chandler was named Johns Hopkins All Children’s Hospital physician of the year in the 2017 Johns Hopkins Medicine Clinical Excellence Awards. Dr. Chandler earned her medical degree from the University of Massachusetts Medical School, Worcester, where she completed her general surgical residency. She completed a research fellowship in surgery at Beth Israel Deaconess Medical Center, Harvard Medical School, and was principal investigator for a grant that focused on overcoming chemoresistance in pancreatic cancer. She also completed a fellowship in pediatric surgery at The Johns Hopkins Hospital and School of Medicine in Baltimore, Maryland, with training in laparoscopic and advanced miniature access surgery. Dr. Chandler is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. Her top areas of expertise are Appendicitis, Pectus Excavatum, Viral Gastroenteritis, Appendectomy, and Endoscopy.

Dr. Ayala is the director of the Hemophilia and Bleeding Disorders Treatment Center at Johns Hopkins All Children's Hospital. She also is the hematology leader of the Young Women Bleeding Disorders/Menorrhagia Clinic, which focuses on a multidisciplinary approach to bleeding symptoms in girls and young women. Dr. Ayala also is involved in the Immune Dysregulation Clinic, which evaluates patients with autoimmune cytopenias in a multidisciplinary approach. Dr. Ayala joined the hospital in 2000. She was the chair of the Division of Hematology/Oncology between 2013-2017 and also served as interim director for the division between 2015-2016. Dr. Ayala's research experience includes multicenter national and international projects. Dr. Ayala received her medical degree from the University of Puerto Rico School of Medicine, her residency training at the San Juan City Hospital in Puerto Rico and her fellowship training at the Emory University School of Medicine Division of Pediatric Hematology/Oncology. Dr. Ayala is a member of the American Society of Pediatric Hematology/Oncology and the Hemophilia and Thrombosis Research Society. Dr. Ayala is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. Her top areas of expertise are Hemophilia A, Venous Thromboembolism (VTE), Blood Clots, and Evans Syndrome.

Dr. Messina is the chief of the Division of Infectious Disease at Johns Hopkins All Children's Hospital. She joined the pediatric infectious disease program in 2006. She became chief of the medical staff in January 2024. A graduate of Vanderbilt University School of Medicine, she completed her pediatric residency at University of Texas-Southwestern Medical Center/Children's Medical Center, Dallas, followed by a pediatric infectious diseases fellowship at UT/Southwestern Medical Center. She was a staff pediatrician at Children's Medical Center Dallas. In the Johns Hopkins Medicine Clinical Awards, Dr. Messina was named Johns Hopkins All Children’s Hospital physician of the year in 2019 and led a COVID-19 Analytic Response Team that received the Armstrong Award for Excellence in Quality and Safety in 2022. Dr. Messina is a fellow of the American Academy of Pediatrics. She is a member of the Pediatric Infectious Disease Society, the American Society for Microbiology and the Infectious Disease Society of America. Dr. Messina serves as a reviewer for the Pediatric Infectious Disease Journal. Recent News Articles and Media Coverage The Right Vaccine Dose for Kids at the Right Age, Bay News 9 (November 4, 2021) Doctors push for children to get vaccinated before the holidays, WFLA -TV (November 10, 2021) 5 tips for parents as omicron spreads and pediatric hospitalizations rise, ABC News (December 30, 2021) CDC Shortens Isolation Period to Five Days for Asymptomatic Cases, CNN (December 28, 2021) When Can Children Get the COVID-19 Vaccine? Pediatricians Explain What to Expect, Prevention (January 4, 2022) Most Americans — and 75% of children — have gotten COVID, says CDC, Tampa Bay Times (April 28, 2022) Doctors on why Florida’s youngest kids should get COVID vaccine, Tampa Bay Times (June 27, 2022) Got questions about COVID vaccines for babies and toddlers? Here’s the answers, Tampa Bay Times (June 20, 2022) Local health officials monitor rise in RSV cases among children, WTVT - TV (November 8, 2022) Health officials alarmed over rise in RSV cases, St. Pete Catalyst (November 10, 2022) Tampa Bay area doctors give advice on back to school as summer winds down, WFTS -TV (July 27, 2022) Flu admissions spike at Tampa Bay hospitals, Tampa Bay Times (November 24, 2022) How Worried Should We Be About RSV?, Sarasota Magazine (November 10, 2022). Dr. Messina is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. Her top areas of expertise are Methicillin-Resistant Staphylococcus Aureus (MRSA) and Infantile Neutropenia.

Dr. Oshrine specializes in blood and marrow transplants as a pediatric hematologist/oncologist in the Johns Hopkins All Children’s Cancer & Blood Disorders Institute. His clinical focus is in the treatment of high-risk leukemias with blood and marrow transplantation, and his research focus is in immune recovery after transplant. He joined the hospital in 2014 after completing a fellowship in pediatric hematology/oncology at the Children’s Hospital of Philadelphia. He received the Excellence in Service & Professionalism Award in the 2018 Johns Hopkins Medicine Clinical Excellence Awards. Dr. Oshrine is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. His top areas of expertise are Chronic Graft Versus Host Disease (cGvHD), Severe Combined Immunodeficiency (SCID), Graft Versus Host Disease (GvHD), Bone Marrow Transplant, and Gastrostomy.

Dr. Mayer is a pediatric hematologist-oncologist in the Johns Hopkins All Children’s Cancer & Blood Disorders Institute. She specializes in the diagnosis and management of patients with acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML), chronic myeloid leukemia (CML), Hodgkin lymphoma and non-Hodgkin lymphoma. She is also the medical director of the Vascular Anomalies and Birthmarks Program at the hospital. She cares for patients with benign and aggressive vascular tumors, lymphatic and venous malformations, and overgrowth syndromes. She was named the William A. Baumgartner Physician of the Year for Johns Hopkins All Children's in the 2024 Johns Hopkins Medicine Clinical Awards. She previously received the hospital’s Best Consulting Physician Award in 2017. Dr. Mayer is the author of more than 30 publications and two textbook chapters. She has presented over 22 research abstracts at national and international medical conferences. She is program director of a three-year fellowship training program in pediatric hematology-oncology on the St. Petersburg, Florida, campus. Dr. Mayer joined Johns Hopkins All Children’s in 1996. Dr. Mayer received her medical degree with honors from Dartmouth Medical School in New Hampshire. She completed her pediatric residency, hematology-oncology fellowship, and clinical research fellowship at Yale University School of Medicine in Connecticut. She is a fellow of the American Academy of Pediatrics and an active member and clinical researcher with Children’s Oncology Group, American Society of Pediatric Hematology-Oncology, and the International Society for the Study of Vascular Anomalies. Dr. Mayer is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. Her top areas of expertise are Acute Lymphoblastic Leukemia (ALL), Evans Syndrome, Acute Monoblastic Leukemia (AmoL), and Teratoma of the Mediastinum.

Dr. Vlachos is the chief of hematology in the Johns Hopkins All Children’s Hospital Cancer & Blood Disorders Institute in St. Petersburg, Florida, and professor of pediatrics (PAR) in the Johns Hopkins University School of Medicine. She joined the hospital staff in 2024. She was previously professor of pediatrics at Zucker School of Medicine at Hofstra/Northwell and attending physician in hematology/oncology at Cohen Children’s Medical Center/Northwell Health, where she was head of the Bone Marrow Failure Program and head of the pediatric hematology/oncology trials office. Dr. Vlachos is internationally known for clinical care and expertise in bone marrow failure syndromes and her transformational research in Diamond Blackfan anemia (DBA) syndrome, a rare inherited bone marrow failure syndrome. Dr. Vlachos is the founder and has directed the Diamond Blackfan Anemia Registry (DBAR) of North America since its inception in 1991. She is the principal investigator and co-investigator on multiple grants funded by the National Institute of Health and the Centers for Disease Control and Prevention. She has published numerous articles on her research findings and has been invited to author papers and book chapters on bone marrow failure syndromes and DBA. Dr. Vlachos is a member of the Medical and Scientific Advisory Board for the Shwachman-Diamond Syndrome Registry, is a member of the Scientific Advisory Board for the Diamond Blackfan Anemia Foundation and holds a position on the Scientific Program Committee for Bone Marrow Failure of the American Society of Hematology. She earned her medical degree from New York Medical College in Valhalla, New York. She completed her residency in pediatrics at North Shore University Hospital in Manhasset, New York. She then completed a clinical fellowship in bone marrow transplantation at North Shore University Hospital, followed by a fellowship in pediatric hematology-oncology and bone marrow transplantation at Mount Sinai Medical Center in New York. Videos Bone Marrow Failure Syndrome Expert Dr. Adrianna Vlachos at Johns Hopkins All Children’s. Dr. Vlachos is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. Her top areas of expertise are Aase Syndrome, Pure Red Cell Aplasia, Aplastic Anemia, and Transient Erythroblastopenia of Childhood.

Dr. Betensky is an assistant professor of Pediatrics in the Division of Hematology at Johns Hopkins University School of Medicine and a pediatric hematologist in the Johns Hopkins All Children’s Cancer & Blood Disorders Institute in St. Petersburg, Florida. Dr. Betensky is director of the hospital's pediatric thrombosis program, providing care for patients with complex thrombotic disorders. She has received various grants and awards to support her research in pediatric venous thromboembolism. Dr. Betensky also has worked to provide medical education, develop research collaborations, and build capacity of hematology programs in Latin America Dr. Betensky earned her medical degree at Universidad Anahuac in Mexico City, Mexico and her masters of public health at Boston University School of Public Health. She completed her pediatric residency and fellowship in Pediatric Hematology-Oncology at Children’s Hospital of Philadelphia. Dr. Betensky is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. Her top areas of expertise are Venous Thromboembolism (VTE), Mesenteric Venous Thrombosis, Multisystem Inflammatory Syndrome in Children (MIS-C), Anemia, and Thrombectomy.

Dr. Wilsey specializes in pediatric gastroenterology, hepatology, and nutrition in the Department of Medicine. He is the vice chair of the Division of Gastroenterology and served as chief of the medical staff from 2020-2021. In 2022, he was named Johns Hopkins All Children’s Hospital Physician of the Year in the Johns Hopkins Medicine Clinical Awards. Dr. Wilsey is an advanced therapeutic endoscopist specializing in endoscopic retrograde cholangiopancreatography (ERCP) for infants and children. He is one of a select group of gastroenterologists with this expertise internationally and across North America. At Johns Hopkins All Children’s Hospital, he has developed and implemented multiple clinical innovations related to therapeutic endoscopy. He is an associate professor of clinical pediatrics at the Johns Hopkins University School of Medicine. Additionally, he is a core faculty member of the Johns Hopkins All Children’s Pediatric Residency Training Program, where he serves as a faculty and research mentor for pediatric resident physicians. Dr. Wilsey has published more than 90 peer-reviewed research articles, review articles, case reports, consensus statements, and book chapters. He also serves as a peer reviewer for several medical journals, and is the associate editor of the Journal of Pediatric Gastroenterology and Nutrition. He has delivered numerous talks nationally and internationally in the field of advanced therapeutic endoscopy, including the management of esophageal strictures. Dr. Wilsey joined the medical staff in 2002. He is also a clinical professor of pediatrics at the University of South Florida College of Medicine and a former associate program director of the University of South Florida Pediatric Residency Training Program. He earned his medical degree from the University of Miami School of Medicine. He completed his pediatric residency at Baylor College of Medicine and Texas Children’s Hospital, followed by fellowship training in pediatric gastroenterology, hepatology, and nutrition at Baylor College of Medicine and Texas Children’s Hospital. Dr. Wilsey sees patients at the following location: Outpatient Care, St. Petersburg 601 5th Street South, St. Petersburg, FL 33701 Phone: 727-822-4300 Recent News Articles and Media Coverage Study finds possible link between long COVID and mystery hepatitis in kids, Today Show - NBC (June 17, 2022) Is COVID-19 Related to Pediatric Cases of Hepatitis? Verywell Health (June 28, 2022). Dr. Wilsey is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. His top areas of expertise are Esophageal Atresia, Eosinophilic Esophagitis, Tracheoesophageal Fistula, Gastrostomy, and Endoscopy.

Dr. Metts specializes in pediatric hematology/oncology in the Johns Hopkins All Children's Cancer & Blood Disorders Institute. He sees patients on our main campus in St. Petersburg and at the Johns Hopkins All Children’s Outpatient Care Center in Tampa. He joined the hospital in 2016. He received his medical degree from the University of South Carolina School of Medicine and completed an internship and residency in pediatrics at Johns Hopkins All Children’s Hospital through the University of South Florida Morsani School of Medicine. Dr. Metts then trained at Emory University School of Medicine as a pediatric hematology/oncology fellow. His clinical interests include sarcomas, rare solid tumors, and Phase 1 and Phase 2 trials for pediatric solid tumors. Dr. Metts is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. His top areas of expertise are Osteosarcoma, Ewing Sarcoma, Rhabdomyosarcoma, and Adult Soft Tissue Sarcoma.

Barry Byrne is a Pediatric Cardiologist and a Pediatrics provider in Gainesville, Florida. Dr. Byrne is rated as an Advanced provider by MediFind in the treatment of Infantile Neutropenia. His top areas of expertise are Pompe Disease, Barth Syndrome, Duchenne Muscular Dystrophy, Becker Muscular Dystrophy, and Bone Marrow Aspiration. Dr. Byrne is currently accepting new patients in some locations.

Howard Katzenstein is a Pediatric Hematologist Oncology provider in Jacksonville, Florida. Dr. Katzenstein is rated as an Advanced provider by MediFind in the treatment of Infantile Neutropenia. His top areas of expertise are Hepatoblastoma, Embryonal Tumor with Multilayered Rosettes, Neuroblastoma, Hepatectomy, and Liver Embolization.

Brandon Chatani is a Pediatric Infectious Disease specialist and a Pediatrics provider in Miami, Florida. Dr. Chatani is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. His top areas of expertise are Multisystem Inflammatory Syndrome in Children (MIS-C) and Infantile Neutropenia. Dr. Chatani is currently accepting new patients.

Binh Vu is a Pediatrics provider in Melbourne, Florida. Dr. Vu is rated as an Experienced provider by MediFind in the treatment of Infantile Neutropenia. His top areas of expertise are Obesity in Children, Delayed Growth, Autism Spectrum Disorder, and White Sponge Nevus. Dr. Vu is currently accepting new patients.