A survey of the use of vitamin B12 in general practice.
D000368:Aged; D005194:Family Practice; D005221:Fatigue / Q000188:drug therapy; D001068:Feeding and Eating Disorders / Q000188:drug therapy; D005260:Female; D006562:Herpes Zoster / Q000188:drug therapy; D006801:Humans; D008297:Male; D009103:Multiple Sclerosis / Q000188:drug therapy; D011247:Pregnancy; D014805:Vitamin B 12 / Q000627:therapeutic use*
D014805:Vitamin B 12