Symposium on the function of the gastrointestinal tract in health and disease: introduction.
D000818:Animals; D001724:Birth Weight; D004064:Digestive System / Q000254:growth & development; D004068:Digestive System Physiological Phenomena; D006801:Humans; D007231:Infant, Newborn; D010828:Physiology, Comparative; D013552:Swine / Q000502:physiology*