1. Clinic for Dermatology and Sexually Transmitted Diseases, Riga’s 1st Hospital, Riga, Latvia
2. Department Microbiology, Virology and Immunology, Kazakh State Agrarian Research University, Almaty, Kazakhstan
3. Department Environmental Law, Yaroslav Mudryi National Law University, Kharkiv, Ukraine
4. Department Labour Law, Yaroslav Mudryi National Law University, Kharkiv, Ukraine