GRADE guidelines: 9. Rating up the quality of evidence

Authors: Gordon Guyatt, Andrew D Oxman, Shahnaz Sultan, Paul Glasziou, Elie A. Akl, Pablo Alonso‐Coello, David Atkins, Regina Kunz, Jan Brożek, Víctor M. Montori, Roman Jaeschke, David M. Rind, Philipp Dahm, Joerg J Meerpohl, Gunn Elisabeth Vist, Elise Berliner, Susan L. Norris, Yngve Falck–Ytter, M. Hassan Murad, Holger J. Schünemann - Journal of Clinical Epidemiology 2011 cited by 1,332