Devière J, Ponchon T, Beilenhoff U, Neuhaus H, Costamagna G, Schmit A, Kruse A, Spicak J, Nowak A
Hepatogastroenterology Unit, Hospital E. Herriot, Place d'Arsonval, 69437 Lyon Cedex 03, Lyon, France.
Endoscopy. 2003 Sep;35(9):765-7. doi: 10.1055/s-2003-41591.