RT Journal Article SR Electronic T1 The Value of Vitamin B12 in Pernicious Anemia JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 148 OP 153 VO 16 IS 3 A1 Bortz, Donald W. YR 1949 UL http://www.ccjm.org/content/16/3/148.abstract AB