F G Bruins1, F J A van Deudekom2, H J C de Vries3. 1. Clinic for Dermatology, DermaPark, Uden, Netherlands. 2. Department of Internal Medicine, Kennemergasthuis, Haarlem, Netherlands. 3. Department of Dermatology, Academic Medical Centre, University of Amsterdam, 1100 DD Amsterdam, Netherlands STI Outpatient Clinic, Public Health Service Amsterdam, Amsterdam, Netherlands Centre for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands h.j.devries@amc.nl.