[1] German Statutory Accid Insurance Adm Sect, Dept Sports Injury Prevent, VBG, Hamburg, Germany
[2] Univ Clin Regensburg, Dept Trauma Surg, Regensburg, Germany
[3] Ruhr Univ Bochum, Bochum, Germany
[4] Ruhr Univ Bochum, Sports Med & Sports Nutr, Bochum, Germany
[5] Univ Klinikum Wurzburg, Dept Trauma Hand Plast & Reconstruct Surg, D-97080 Wurzburg, Bayern, Germany