1. Associate Professor, Department of Orthodontics and Dentofacial Orthopedics, Center of Dentistry, Georg-August-University, Göttingen, Germany
2. Research Fellow, Department of Orthodontics and Dentofacial Orthopedics, Center of Dentistry, Georg-August-University, Göttingen, Germany
3. Research Assistant, Department of Medical Statistics, Georg-August-University, Göttingen, Germany
4. Professor and Department Head, Department of Orthodontics and Dentofacial Orthopedics, Center of Dentistry, Georg-August-University, Göttingen, Germany
5. Former resident; now in private practice, Hannover, Germany
6. Assistant Professor, Department of Preventive Dentistry, Periodontology and Cariology, Center of Dentistry, Georg-August-University, Göttingen, Germany