Authors: D Vaira; J Holton; M Menegatti; C Ricci; F Landi; A Ali'; L Gatta; C Acciardi; S Farinelli; M Crosatti; S Berardi; M Miglioli Journal: Gut Date: 1999-07 Impact factor: 23.059
Authors: S J Veldhuyzen van Zanten; N Flook; N Chiba; D Armstrong; A Barkun; M Bradette; A Thomson; F Bursey; P Blackshaw; D Frail; P Sinclair Journal: CMAJ Date: 2000-06-13 Impact factor: 8.262