Authors: Lorenzo P Moja; Ivan Moschetti; Munira Nurbhai; Anna Compagnoni; Alessandro Liberati; Jeremy M Grimshaw; An-Wen Chan; Kay Dickersin; Karmela Krleza-Jeric; David Moher; Ida Sim; Jimmy Volmink Journal: Trials Date: 2009-07-22 Impact factor: 2.279