'Serum only' Schilling's test in patients with subtotal gastrectomy.
D003037:Cobalt Radioisotopes; D005743:Gastrectomy; D006801:Humans; D007408:Intestinal Absorption; D014805:Vitamin B 12 / Q000378:metabolism*
D003037:Cobalt Radioisotopes; D014805:Vitamin B 12