[1] Aspetar Orthopaed & Sports Med Hosp, Aspetar Sports Groin Pain Ctr, Aspetar Sports Injury & Illness Prevent Programme, Sports Med Dept,Res Dept, Doha, Qatar
[2] Copenhagen Univ Hosp, Dept Orthopaed Surg, Arthroscop Ctr Amager, SORC C, Amager Hvidovre, Denmark
[3] La Trobe Univ, Sch Allied Hlth, La Trobe Sport & Exercise Med Res Ctr, Melbourne, Vic, Australia
[4] Acad Med Ctr, Acad Ctr Evidence Based Med, Amsterdam, Netherlands
[5] Norwegian Sch Sports Sci, Oslo Sports Trauma Res Ctr, Oslo, Norway
[6] Erasmus MC, Dept Orthopaed, Ctr Groin Injuries, Univ Med Ctr, Rotterdam, Netherlands