[1] Univ Texas MD Anderson Canc Ctr, Div Quantitat Sci, Houston, TX 77030 USA
[2] Univ Toronto, Div Publ Hlth Sci, Toronto, ON, Canada
[3] UCL, Dept Surg, London, England
[4] UCL, Dept Med Humanities, London, England
[5] Johns Hopkins Univ, Dept Epidemiol, Baltimore, MD USA
[6] Johns Hopkins Univ, US Cochrane Ctr, Baltimore, MD USA
[7] Harvard Univ, Sch Med, Dept Ambulatory Care & Prevent, Boston, MA USA
[8] Nord Cochrane Ctr, Copenhagen, Denmark
[9] EHESP, Sch Publ Hlth, Dept Epidemiol & Clin Med, Rennes, France
[10] Ullevaal Univ Hosp, Dept Pathol, Oslo, Norway
[11] Dartmouth Inst Hlth Policy & Clin Practice, Hanover, NH USA
[12] White River Junct VA Med Ctr, VA Outcomes Grp, White River Jct, VT USA
[13] Univ Leicester, Dept Hlth Sci, Leicester, Leics, England
[14] Norwegian Inst Publ Hlth, Oslo, Norway