1. Second Department of Dermatology and Venereology, University General Hospital "ATTIKON" Medical School, National and Kapodistrian University of Athens Chaidari, Athens Greece
2. First Department of Medicine, Laikon Hospital, Medical School National and Kapodistrian University of Athens Athens Greece
3. Department of Pediatric and Congenital Heart Surgery Onassis Heart Surgery Centre Athens Greece
4. Department of Physiology, Medical School National and Kapodistrian University of Athens Athens Greece
5. Athens Medical Centre Athens Greece
6. Departments of Dermatology, Venereology, Allergology and Immunology, Staedtisches Klinikum Dessau Brandenburg Medical School Theodor Fontane and Faculty of Health Sciences Brandenburg Dessau Germany