[Serum cobalamin levels in ambulatory elderly patients].
González-Clemente
José Miguel
JM
Galdón
Gloria
G
Mitjavila
Joan
J
Mauricio
Didac
D
D000368:Aged; D000553:Ambulatory Care; D005260:Female; D006801:Humans; D008297:Male; D014805:Vitamin B 12 / Q000097:blood*
D014805:Vitamin B 12