Department of Dermatology, Hammersmith Hospital, Imperial College London, London, United Kingdom
Maria de Lourdes Bialon Santana, MD
Department of Pathology, Faculty of Medical Sciences, State University of Campinas, Campinas, Brazil
Maria L. Cintra, MD, PhD
Department of Pathology, Faculty of Medical Sciences, State University of Campinas, Campinas, Brazil; Correspondence to: Prof Maria L. Cintra, Department of Pathology, Faculty of Medical Sciences, State University of Campinas, Rua Tessália Vieira de Camargo, 126. Cidade Universitária Zeferino Vaz, CEP 13083-887—Campinas, SP, Brazil.