1. State Clinic of Dermatology Mureș County Hospital Tîrgu Mureș Romania
2. First Department of Dermatology Aristotle University Thessaloniki Greece
3. Postgraduate Study Program in Dermatology, Venereology University of Latvia Riga Latvia
4. Postgraduate Study Program in Dermatology, Venereology RigaStradiņš University Riga Latvia
5. State Clinic of Dermatology Hippokration Hospital Thessaloniki Greece