1. Department of Behavioral Neurobiology, Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev St, Bl. 23, 1113 Sofia, Bulgaria
2. Department of Vascular Surgery and Angiology, Medical Faculty, Medical University Sofia, P. Slaveykov Bl. 52, 1000 Sofia, Bulgaria
3. Department of Biomechanics, Institute of Mechanics, Bulgarian Academy of Sciences, Acad. G. Bonchev St, Bl. 4, 1113 Sofia, Bulgaria