1 Department of Trauma, Hand and Reconstructive Surgery, Giessen University Hospital Giessen-Marburg, Campus Giessen, Rudolf-Buchheim-Str. 7, 35385 Giessen, Germany; Department of Trauma and Orthopaedics, University of Edinburgh, Royal Infirmary of Edinburgh, 51 Little France Crescent, Old Dalkeith Road, Edinburgh, EH16 4SA, UK; Orthopaedic Trauma Institute, UCSF, San Francisco General Hospital, 2550 23rd Street Building 9, 2nd Floor, San Francisco, CA 94110, USA. Electronic address: volker.alt@chiru.med.uni-giessen.de.
2 Department of Trauma, Hand and Reconstructive Surgery, Giessen University Hospital Giessen-Marburg, Campus Giessen, Rudolf-Buchheim-Str. 7, 35385 Giessen, Germany; Department of Trauma and Orthopaedics, University of Edinburgh, Royal Infirmary of Edinburgh, 51 Little France Crescent, Old Dalkeith Road, Edinburgh, EH16 4SA, UK; Orthopaedic Trauma Institute, UCSF, San Francisco General Hospital, 2550 23rd Street Building 9, 2nd Floor, San Francisco, CA 94110, USA.