Affiliation: | 1. Department of Orthopaedic Surgery, Sint Maartenskliniek, Nijmegen, The Netherlands 2. Department of General Surgery, Central Military Hospital, Utrecht, The Netherlands 6. Rietgrachtstraat 41-21, 6828 KB, Arnhem, The Netherlands 3. Department of Research, Sint Maartenskliniek, Nijmegen, The Netherlands 4. Department of General Surgery, Medical Centre Alkmaar, Alkmaar, The Netherlands 5. Department of General Surgery, Diakonessenhuis, Utrecht, The Netherlands
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