[1] Univ Med Ctr Rotterdam, Dept Publ Hlth, Erasmus MC, POB 2040, NL-3000 CA Rotterdam, Netherlands
[2] Northwest Clin Alkmaar, Dept Surg, POB 501, NL-1800 AM Alkmaar, Netherlands
[3] Univ Med Ctr Rotterdam, Trauma Res Unit, Erasmus MC, Dept Surg, POB 2040, NL-3000 CA Rotterdam, Netherlands
[4] Amsterdam UMC Locat AMC, Geriatr Sect, Dept Internal Med, POB 22660, NL-1100 DD Amsterdam, Netherlands
[5] Leiden Univ, Dept Publ Hlth & Primary Care, Med Ctr, Hippocratespad 21,POB 9600, NL-2300 RC Leiden, Netherlands
[6] Elisabeth TweeSteden Ziekenhuis, Dept Orthopaed Surg, POB 90151, NL-5000 LC Tilburg, Netherlands
[7] Rode Kruis Ziekenhuis, Dept Surg, POB 1074, NL-1940 EB Beverwijk, Netherlands
[8] Dijklander Ziekenhuis, Dept Orthopaed Surg, POB 600, NL-1620 AR Hoorn, Netherlands
[9] Elisabeth TweeSteden Ziekenhuis, Dept Trauma TopCare, POB 90151, NL-5000 LC Tilburg, Netherlands
[10] Isala, Dept Orthopaed Surg, POB 10400, NL-8000 GK Isala, Netherlands