TY - JOUR T1 - Cobalamin deficiency in elderly patients JF - Canadian Medical Association Journal JO - CMAJ SP - 450 LP - 451 DO - 10.1503/cmaj.1041424 VL - 172 IS - 4 AU - Jonathan E. Prousky Y1 - 2005/02/15 UR - http://www.cmaj.ca/content/172/4/450.2.abstract ER -