1. Dermatology Department; Walsall Healthcare NHS Trust; Walsall UK
2. Centre for Dermatology and Genetic Medicine; Division of Biological Chemistry and Drug Discovery; School of Life Sciences; University of Dundee; Dundee UK
3. Department of Medical Genetics; Haydarpasa Numune Hospital; Istanbul Turkey
4. Department of Pediatrics; Columbia University Medical Center; New York NY USA
5. Division of Computational Biology; School of Life Sciences; University of Dundee; Dundee UK
6. Department of Dermatology; University of Utah; Salt Lake City UT USA
7. Institute of Human Genetics; University of Bonn; Bonn Germany
8. Institute of Medical Genetics and Applied Genomics and Department of Obstetrics and Gynecology; University Hospital of Tübingen; Tübingen Germany
9. Pachyonychia Congenita Project; Salt Lake City UT USA