1. Department of Plastic and Reconstructive Surgery, CWZ, Nijmegen, The Netherlands
2. Department of Plastic and Reconstructive Surgery, Radboud University Medical Center, Nijmegen, The Netherlands
3. Department of Plastic and Reconstructive Surgery, Martini Hospital, Groningen, The Netherlands
4. Department of Neurosurgery, Radboud University Medical Center, Nijmegen, The Netherlands