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Elevated Methylmalonic Acid and Total Homocysteine Levels Show High Prevalence of Vitamin B12 Deficiency after Gastric Surgery
Anne E. Sumner, MD; Margaret M. Chin, PharmD; Janet L. Abrahm, MD; Gerard T. Berry, MD; Edward J. Gracely, PhD; Robert H. Allen, MD; Sally P. Stabler, MD
Annals of Internal Medicine 1996;124:469-476. doi:10.7326/0003-4819-124-5-199603010-00002

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