[1] Washington Univ, Sch Med, Dept Surg, St Louis, MO 63112 USA
[2] Brown Univ, Alpert Med Sch, Ctr Stat Sci, Dept Community Hlth, Providence, RI 02912 USA
[3] Univ Quebec, Ctr Hosp, Res Ctr, Tier Canada Res Chair Implementat Shared Decis Ma, Quebec City, PQ, Canada
[4] Univ Laval, Dept Family Med & Emergency Med, Quebec City, PQ, Canada