Alessio Degl' Innocenti , Gordon H Guyatt , Ingela Wiklund , Diane Heels-Ansdell , David Armstrong , Carlo A Fallone , Lisa Tanser , Sander Veldhuyzen van Zanten , Samer El-Dika , Naoki Chiba , Alan N Barkun , Peggy Austin and Holger J Schünemann
Health and Quality of Life Outcomes 2005, 3:4doi:10.1186/1477-7525-3-4