Puhan Milo A, Schünemann Holger J, Murad Mohammad Hassan, Li Tianjing, Brignardello-Petersen Romina, Singh Jasvinder A, Kessels Alfons G, Guyatt Gordon H
Epidemiology, Biostatistics and Prevention Institute-Epidemiology, Hirschengraben 84, Zurich 8001, Switzerland
Department of Clinical Epidemiology and Biostatistics, McMaster University, Health Sciences Centre, Hamilton, Ontario L8N 3Z5, Canada.
BMJ. 2014 Sep 24;349:g5630. doi: 10.1136/bmj.g5630.