1. Division of Dermatology, Tel Aviv Sourasky Medical Center Tel Aviv Israel
2. Sackler Faculty of Medicine Tel Aviv University Tel Aviv Israel
3. Department of Dermatology Royal Hospital for Children Glasgow UK
4. Blizard Institute, Faculty of Medicine and Dentistry, Queen Mary University of London London UK
5. Department of Dermatology The Royal London Hospital London UK
6. Pachyonychia Congenita Project Holladay UT USA