[1] Norwegian Sch Sport Sci, Oslo Sports Trauma Res Ctr, Dept Sports Med, N-0608 Oslo, Norway
[2] IOC Med Commiss, Lausanne, Switzerland
[3] IAAF, Monaco, Spain
[4] IIHF, Zurich, Switzerland
[5] Federat Int Football Football Assoc FIFA, Zurich, Switzerland
[6] FIFA Med Assessment & Res Ctr F MARC, Zurich, Switzerland
[7] Schulthess Klin, Zurich, Switzerland
[8] Univ Calgary, Sport Injury Prevent Res Ctr, Calgary, AB T2N 1N4, Canada
[9] Federat Int Natat FINA, Lausanne, Switzerland
[10] Karolinska Inst, Stockholm, Sweden
[11] VANOC 2010, Vancouver, BC, Canada