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
- LithotripsyDr. Johnston isAdvanced. Learn about Lithotripsy.
- Experienced
- Biliary DyskinesiaDr. Johnston isExperienced. Learn about Biliary Dyskinesia.
- Chronic CoughDr. Johnston isExperienced. Learn about Chronic Cough.
- Diabetic Macular Edema (DME)Dr. Johnston isExperienced. Learn about Diabetic Macular Edema (DME).
- Diverticular DiseaseDr. Johnston isExperienced. Learn about Diverticular Disease.
- EndoscopyDr. Johnston isExperienced. Learn about Endoscopy.
- Gallbladder DiseaseDr. Johnston isExperienced. Learn about Gallbladder Disease.
View All 20 Experienced Conditions
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