1. Institute of Human Genetics; University of Bonn; Bonn; Germany
2. Orthodontic Unit; Dental Hospital & School; University of Dundee; Dundee; UK
3. Erasmus Medical Center; University Medical Center; Rotterdam; The Netherlands
4. Department of Biomedical and Specialty Surgical Sciences; Medical Genetics Unit; University of Ferrara; Ferrara; Italy
5. Clinical Institute of Medical Genetics; Department of Obstetrics and Gynaecology; University Medical Centre Ljubljana; Ljubljana; Slovenia
6. Department of Clinical Medicine; Trinity College Dublin; Dublin; Ireland
7. Institute of Medical Biometry; Informatics and Epidemiology; University of Bonn; Bonn; Germany