Jonathan Zhang, MD

Article

In reply: Vitamin B12 deficiency

Author:

Jonathan Zhang, MD

Publish date: January 1, 2016

A single vitamin B₁₂ level less than 200 pg/mL has a specificity greater than 95%.

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Article

An unusual cause of vitamin B12 and iron deficiency

Author:

Jonathan Zhang, MD

Publish date: July 1, 2015

Testing for ova and parasites was negative, but video capsule endoscopy revealed a tapeworm in the distal duodenum.

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