1. Onkoderma‐Clinic for Dermatology, Venereology and Dermatologic Surgery Sofia Bulgaria
2. Department of Dermatology, Venereology and Dermatologic SurgeryMedical Institute of Ministry of Interior (MVR‐Sofia), University Hospital MVR Sofia Bulgaria
3. Department of Dermatology and VenereologyUniversity of Rome “G. Marconi” Rome Italy
4. Department of Dermatology and VenereologyUniversity Hospital of Coimbra Coimbra Portugal
5. Department of Dermatology and VenereologyMilitary Medical Academy Belgrade Serbia
6. “Onkoderma”‐Policlinic for Dermatology and Dermatologic Surgery Sofia Bulgaria