Guyatt Gordon H, Alonso-Coello Pablo, Vandvik Per Olav
Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada.
J Clin Epidemiol. 2012 Dec;65(12):1243-4. doi: 10.1016/j.jclinepi.2012.07.013. Epub 2012 Sep 13.