1. Heart of England NHS Foundation Trust, Department of Dermatology; Royal Victoria Infirmary, Department of Dermatology, Queen Victoria Road Newcastle upon Tyne NE1 4LP
2. Royal Victoria Infirmary, Department of Dermatology, Queen Victoria Road, Newcastle upon Tyne NE1 4LP
3. Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne
4. University Hospital of North Durham, Department of Dermatology, North Road Durham, DH1 5TW, Institute of Cellular Medicine, Newcastle University, UK