Authors: Samer El-Dika; Gordon H Guyatt; David Armstrong; Alessio Degl'innocenti; Ingela Wiklund; Carlo A Fallone; Lisa Tanser; Sander Veldhuyzen van Zanten; Diane Heels-Ansdell; Peter Wahlqvist; Naoki Chiba; Alan N Barkun; Peggy Austin; Holger J Schünemann Journal: BMC Gastroenterol Date: 2005-07-10 Impact factor: 3.067