1. Department of Pathology & Medical Biology; University of Groningen and University Medical Center Groningen; Groningen the Netherlands
2. Department of Plastic Surgery; University of Groningen and University Medical Center Groningen; Groningen the Netherlands
3. Department of Oral & Maxillofacial Surgery; University Medical Center Groningen, University of Groningen; Groningen the Netherlands
4. Bergman Clinics, locations Heerenveen; Zwolle and Groningen the Netherlands