Authors: Gordon Guyatt; Andrew D Oxman; Elie A Akl; Regina Kunz; Gunn Vist; Jan Brozek; Susan Norris; Yngve Falck-Ytter; Paul Glasziou; Hans DeBeer; Roman Jaeschke; David Rind; Joerg Meerpohl; Philipp Dahm; Holger J Schünemann Journal: J Clin Epidemiol Date: 2010-12-31 Impact factor: 6.437