1. Department of Oral and Maxillofacial Surgery, University Hospital Regensburg, 93053 Regensburg, Germany
2. Department of Oral and Maxillofacial Surgery, School of Medicine, Technical University of Munich, 81675 Munich, Germany
3. Division of Plastic Surgery, Department of Surgery, Yale New Haven Hospital, Yale School of Medicine, New Haven, CT 06510, USA
4. Department of Plastic Surgery, University of Pittsburgh, Pittsburgh, PA 15261, USA
5. Craniologicum, Center for Cranio-Maxillo-Facial Surgery, 3011 Bern, Switzerland
6. Faculty of Medicine, University of Bern, 3010 Bern, Switzerland
7. Department of Plastic, Hand and Reconstructive Surgery, University Hospital Regensburg, 93053 Regensburg, Germany