Guyatt Gordon H, Mulla Sohail M, Scott Ian A, Jackevicius Cynthia A, You John J
Department of Clinical Epidemiology and Biostatistics, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada,
J Gen Intern Med. 2014 Apr;29(4):562. doi: 10.1007/s11606-013-2727-3.