[Study of vitamin B12 absorption after gastrectomy].
D000042:Absorption; D003036:Cobalt Isotopes; D005743:Gastrectomy; D005753:Gastric Mucosa / Q000502:physiology*; D006801:Humans; D013270:Stomach / Q000502:physiology*; D014805:Vitamin B 12 / Q000378:metabolism*
D003036:Cobalt Isotopes; D014805:Vitamin B 12