Hoekstra Elisabeth R, Fockens Paul, Scholten Pieter
Department of Gastroenterology, Sint Lucas Andreas Hospital, and Academic Medical Center, Amsterdam, the Netherlands.
Gastrointest Endosc. 2007 Jun;65(7):1086-8. doi: 10.1016/j.gie.2006.10.033. Epub 2007 Apr 23.