1. Institute of Genetic Medicine; Newcastle University; Newcastle upon Tyne NE1 3BZ U.K.
2. Department of Dermatology; Royal Victoria Infirmary; Newcastle upon Tyne U.K.
3. Department of Surgery; Freeman Hospital; Newcastle upon Tyne U.K.
4. Department of Radiology; Royal Victoria Infirmary; Newcastle upon Tyne U.K.
5. Department of Histopathology; Royal Victoria Infirmary; Newcastle upon Tyne U.K.
6. Northern Centre for Cancer Care; Freeman Hospital; Newcastle upon Tyne U.K.