[1] Univ Ottawa, Sch Epidemiol & Publ Hlth, Ottawa, ON, Canada
[2] Publ Hlth Agcy Canada, Global Hlth & Guidelines Div, Ottawa, ON, Canada
[3] Univ Continuing Educ Krems, Dept Evidence based Med & Evaluat, Cochrane Austria, Krems, Niederosterreic, Austria
[4] Canadian Assoc Radiologists, Ottawa, ON, Canada
[5] Univ Galway, Sch Nursing & Midwifery, Cochrane Ireland & Evidence Synth Ireland, Galway, Ireland