Occam's Razor for Severe B12 Deficiency

Affiliations

• ¹ Hospital Medicine Unit and the Division of General Internal Medicine, Department of Medicine at Brigham and Women's Hospital and Harvard Medical School, Boston, Mass.
• ² Department of Pathology at Brigham and Women's Hospital and Harvard Medical School, Boston, Mass.
• ³ Hematology Division, Department of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, Mass.
• ⁴ Hematology Division, Department of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, Mass; Dana Farber Cancer Institute, and Massachusetts General Hospital, Boston.
• ⁵ Hospital Medicine Unit and the Division of General Internal Medicine, Department of Medicine at Brigham and Women's Hospital and Harvard Medical School, Boston, Mass. Electronic address: ebarkoudah@research.bwh.harvard.edu.