1. The Dermatology Research Centre; Institute of Inflammation and Repair; University of Manchester; Stopford Building, Oxford Road Manchester M13 9PT U.K
2. Department of Dermatology; University of Münster; Münster Germany
3. Instituto Biodonostia; Hospital Universitario Donostia; Paseo Dr Begiristain s/n 20014 San Sebastián Spain
4. Department of Pathology; Hospital Universitario Reina Sofía; Murcia Spain