[1] Univ Western Australia, Western Australian Inst Med Res, Nedlands, WA 6009, Australia
[2] Univ Bern, Inst Psychol, Bern, Switzerland
[3] Asklepios Klinikum Uckermark, Dept Orthopaed Surg, Schwedt Oder, Germany
[4] Univ Bern, MEM Res Ctr, Bern, Switzerland
[5] Univ Otago, Dunedin Sch Med, Dunedin, New Zealand