Areas of Expertise
MediFind evaluates expertise by pulling from factors such as number of articles a doctor has published in medical journals, participation in clinical trials, speaking at industry conferences, prescribing and referral patterns, and strength of connections with other experts in their field.
Learn more about MediFind’s expert tiers
Find Dr. Johnston's expertise for a condition
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- Advanced
- Chronic Obstructive Pulmonary Disease (COPD)
- Lung MetastasesDr. Johnston isAdvanced. Learn about Lung Metastases.
- Experienced
- Alopecia AreataDr. Johnston isExperienced. Learn about Alopecia Areata.
- Alzheimer's DiseaseDr. Johnston isExperienced. Learn about Alzheimer's Disease.
- AnemiaDr. Johnston isExperienced. Learn about Anemia.
- AsthmaDr. Johnston isExperienced. Learn about Asthma.
- Asthma in ChildrenDr. Johnston isExperienced. Learn about Asthma in Children.
- Attention Deficit Hyperactivity Disorder (ADHD)
View All 75 Experienced Conditions
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