XXV Argentinean Congress of Gastroenterology. XII Argentinean Congress of Digestive Endoscopy. II Argentinean Sessions on Nutrition and Pediatric Gastroenterology. Buenos Aires, Argentina, 6-10 October 1991. Abstracts
XXV Congreso Argentino de Gastroenterologia. XII Congreso Argentino de Endoscopia Digestiva. II Jornadas Argentinas de Gastroenterologia Pediatrica y Nutricion. Buenos Aires, Argentina, 6-10 Octubre 1991