RT Journal Article SR Electronic T1 In reply: Vitamin B12 deficiency (July 2015) JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 15 OP 15 DO 10.3949/ccjm.83c.01002 VO 83 IS 1 A1 Nguyen, Douglas L. A1 Maithel, Shelly A1 Duong, Alex K. A1 Zhang, Jonathan YR 2016 UL http://www.ccjm.org/content/83/1/15.2.abstract AB