1. Department of Plastic Surgery, University of Groningen, University Medical Center Groningen, GZ, Groningen, Netherlands
2. Department of Health Sciences, Community and Occupational Medicine, University of Groningen, University Medical Center Groningen, GZ, Groningen, Netherlands
3. Department of Rehabilitation Medicine, University of Groningen, University Medical Center Groningen, GZ, Groningen, Netherlands
4. Department of Oral and Maxillofacial Surgery, University of Groningen, University Medical Center Groningen, GZ, Groningen, Netherlands