1. Department of Dermatology and Venereology, Tzaneio General Hospital, Piraeus, Greece
2. Department of Internal Medicine, Réseau Hospitalier Neuchâtelois, Neuchâtel, Switzerland
3. Department of Business Administration, University of Western Attica, Athens, Greece
4. Department of Skin & Venereal Diseases, Faculty of Medicine, University of Ioannina, Ioannina, Greece