RT Journal Article SR Electronic T1 Are strict vegetarians at risk of vitamin B12 deficiency? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 87 OP 87 VO 67 IS 2 A1 Novy, Margareta YR 2000 UL http://www.ccjm.org/content/67/2/87.abstract AB