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American Family Physician: “Vitamin B12 Deficiency: Recognition and Management,” “Common Tongue Conditions in Primary Care.”
American Society of Hematology: “Anemia.”
Harvard Health Publishing: “Vitamin B12 deficiency can be sneaky, harmful.”
Mayo Clinic: “Vitamin B-12.”
U.K. National Health Service: “Vitamin B12 or folate deficiency anaemia.”
NIH Office of Dietary Supplements: “Vitamin B12 Fact Sheet.”
The Journal of the American Osteopathic Association: “Nutritional Deficiencies After Gastric Bypass Surgery.”
Reviewed by Jennifer Robinson, MD on April 25, 2020
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