1. AMBICON Lab, Faculty of Natural and Technical Sciences University Goce Delcev Sthip Macedonia
2. University Clinic of Dermatology, Medical Faculty Ss Cyril and Methodius University in Skopje Sthip Macedonia
3. Faculty of Medical Sciences Goce Delcev University Stip Macedonia
4. Acibadem Sistina Clinical Hospital Skopje Macedonia
5. Department of Dermatology and Venereology Acibadem City Clinic Sofia Bulgaria
6. Section of Dermatovenereology Trakia University Stara Zagora Bulgaria
7. Department of Dermatology and Venereology Medical University Sofia Sofia Bulgaria
8. Department of Dermatology and Venereology University Hospital Centre Sestre Milosrdnice Zagreb Croatia