1. Dermatology and Laser Clinic, 88 Tsimiski Street, 54622 Thessaloniki, Greece
2. Dermatology and Laser Center, Reduitstrare 13, 76829 Landau, Germany
3. Gazi University Medical Faculty, Department of Dermatology, 06510 Ankara, Turkey
4. Aristotle University School of Medicine, Second Department of Dermatology and Venereology, 54622 Thessaloniki, Greece
5. Université Libre de Bruxelles, Department CHU Brugmann-Saint Pierre, 1050 Brussels, Belgium
6. Carol Davila University of Medicine, Dionisie Lupu Street, 020021 Bucharest, Romania
7. Osnabrueck University, Sedanstraße 115, 49090 Osnabrueck, Germany
8. Bern University, Department of Dermatology, 117 Inselspital, 3010 Bern, Switzerland