RT Journal Article SR Electronic T1 Response to letters about vitamin B12 JF Canadian Family Physician JO Can Fam Physician FD The College of Family Physicians of Canada SP 522 OP 522 VO 60 IS 6 A1 Kolber, Michael R. A1 Houle, Sherilyn K.D. YR 2014 UL http://www.cfp.ca/content/60/6/522.1.abstract