Robert J Y, Bretagne J F, Raoul J L, Siproudhis L, Heresbach D, Gosselin M
Department of Hepato-gastroenterology and Digestive Endoscopy, University Hospital Pontchaillou, Rennes, France.
Gastrointest Endosc. 1993 May-Jun;39(3):452-4. doi: 10.1016/s0016-5107(93)70130-3.