1. Department of Biology, Medical University—Pleven, “St. Kliment Ohridski” Str. 1, 5800 Pleven, Bulgaria
2. Institute of Molecular Biology “Rumen Tzanev”, Bulgarian Academy of Sciences, “Acad. George Bonchev” Str., Bl. 21, 1113 Sofia, Bulgaria
3. School of Pharmacy, University Lille, Inserm, CHU Lille, UMR-S 1172–LiNC–Lille Neuroscience and Cognition, F-59000 Lille, France
4. Institute of Biology and Immunology of Reproduction, Bulgarian Academy of Sciences, Tsarigradsko Shosse, 73, 1113 Sofia, Bulgaria
5. Department Biotechnology, Ghent University, Proeftuinstraat 86, 9000 Gent, Belgium