Halil Yildiz1, Liliane Marot2. 1. Department of Internal Medicine and Infectious Diseases, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium. Electronic address: halil.yildiz@uclouvain.be. 2. Department of Dermatology and Pathology, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, Belgium.