1St John's Institute of Dermatology, Guys' and St Thomas' NHS Foundation Trust, London, UK
2Department of Dermatology, University Hospital Birmingham, Birmingham, UK
3Department of Dermatopathology, St John's Institute of Dermatology, Guys' and St Thomas' NHS Foundation Trust, London, UK
4Department of Pathology, Dijon's University Hospital and the Centre de Pathologie, Dijon, France
5Alistair Robson, FRCPath Dip RCPath,
6Department of Dermatopathology, St John's
7Fax: +0044 207 188 6382
8Institute of Dermatology, Guys' and St Thomas'
9NHS Foundation Trust, London, UK
10Tel: +0044 207 188 6408