1. Department of Dermatology; Cambridge University Hospital NHS Foundation Trust, Hills Road; Cambridge UK
2. Department of Dermatology; Chelsea and Westminster NHS Foundation Trust; London UK
3. Department of Dermatology; Peterborough City Hospital; Peterborough Cambridgeshire UK
4. St John's Institute of Dermatology; Guy's and St Thomas’ NHS Foundation Trust; London UK
5. Department of Clinical Genetics; Addenbrooke's Hospital; Cambridge University Hospital NHS Foundation Trust, Hills Road; Cambridge UK