1. Institut fuer Humangenetik; Philipps-Universitaet; Marburg; Germany
2. Children's Hospital; UAB; Birmingham; Alabama; Germany
3. Department of Dermatology; CHU of Bab-El-Oued; Algiers; Algeria
4. Service de Dermatologie et de Pédiatrie; Hôpital Jeanne de Flandre, CHRU; Lille; France
5. West Midlands Regional Genetic Service; Birmingham Women's Foundation Trust; Birmingham; UK
6. Faculty of Medicine; University of Kelaniya; Ragama; Sri Lanka
7. Freiburg University Medical Center; Institute of Human Genetics; Freiburg i. Br.; Germany
8. North Colombo Teaching Hospital; Ragama; Sri Lanka
9. Service de Dermatologie; Hôpital Necker - Enfants Malades; Paris; France
10. Universitaets-Hautklinik; Universitaetsklinikum Freiburg; Freiburg i. Br.; Germany
11. Clinical Genetics; Guy's Hospital; London; UK
12. Praxis für Humangenetik-Altona; Hamburg; Germany
13. Universitaets-Hautklinik; Philipps-Universitaet; Marburg; Germany
14. Unité de Génétique Médicale; Université Saint Joseph; Beirut; Lebanon
15. Service de Dermatologie; Saint Georges Hospital; Beirut; Lebanon
16. Universitaets-Hautklinik; Universitaet Muenster; Muenster; Germany
17. Children's Health System; Children's South; Birmingham; Alabama
18. Department of Medical Sciences; University Hospital, Uppsala University; Uppsala; Sweden
19. Department of Human Genetics; Radboud University Nijmegen Medical Centre; Nijmegen; The Netherlands