Authors: P J Devereaux; Diane Heels-Ansdell; Christina Lacchetti; Ted Haines; Karen E A Burns; Deborah J Cook; Nikila Ravindran; S D Walter; Heather McDonald; Samuel B Stone; Rakesh Patel; Mohit Bhandari; Holger J Schünemann; Peter T-L Choi; Ahmed M Bayoumi; John N Lavis; Terrence Sullivan; Greg Stoddart; Gordon H Guyatt Journal: CMAJ Date: 2004-06-08 Impact factor: 8.262