1. Department of Oral and Maxillofacial Surgery/Special Dental Care; University Medical Center Utrecht; Utrecht The Netherlands
2. Department of Oral and Maxillofacial Surgery; Academic Medical Center (AMC)/Academic Centre for Dentistry Amsterdam (ACTA); Amsterdam The Netherlands
3. Department of Oral and Maxillofacial Surgery/Oral Pathology; VU University Medical Center/Academic Centre for Dentistry Amsterdam (ACTA); Amsterdam The Netherlands