PROMOTION 306,041 Promotion of ethics in gastroenterology : Proceedings of the International Workshop held at the 78th General Meeting of the Japanese Society of Gastroenterology, Tokyo, April 8th-10th, 1992 / [Masaharu Tsuchiya president. - Tokyo : The Japanese Society of Gastroenterology, 1993]. - [16], 54 s. ; 29 cm (Gastroenterologia Japonica, ISSN 0435-1339 ; vol.28, suppl.6)