1 Department of Plastic Surgery, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands.
2 Amsterdam Plastic Surgery, Amsterdam, The Netherlands.
3 Department of Maxillofacial Surgery, University of Verona, Verona, Italy.
4 Department of Plastic Surgery, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands, Bergman Clinics, Naarden, The Netherlands.