Gastrointestinal surgery as it affects nutrition.
D001647:Bile Acids and Salts / Q000378:metabolism; D002118:Calcium / Q000378:metabolism; D004063:Digestion; D005743:Gastrectomy / Q000009:adverse effects*; D006801:Humans; D007408:Intestinal Absorption; D007421:Intestine, Small / Q000601:surgery*; D008286:Malabsorption Syndromes / Q000209:etiology* / Q000378:metabolism; D009748:Nutrition Disorders / Q000209:etiology* / Q000378:metabolism; D014815:Vitamins / Q000378:metabolism
D001647:Bile Acids and Salts; D014815:Vitamins; D002118:Calcium