Authors: Jeltsje S Cnossen; Rachel K Morris; Gerben ter Riet; Ben W J Mol; Joris A M van der Post; Arri Coomarasamy; Aeilko H Zwinderman; Stephen C Robson; Patrick J E Bindels; Jos Kleijnen; Khalid S Khan Journal: CMAJ Date: 2008-03-11 Impact factor: 8.262