1. Department of Dermatology James Cook University Hospital Middlesbrough TS4 3BW UK
2. Clinical Genetics James Cook University Hospital Middlesbrough TS4 3BW UK
3. Department of Dermatopathology St John’s Institute of Dermatology St Thomas’ Hospital London SE1 7EH UK
4. Department of Dermatology Royal Victoria Infirmary Newcastle upon Tyne NE1 4LP UK
5. Translational and Clinical Research Institute Newcastle University Newcastle upon Tyne NE1 3BZ UK