Tsaritsa Yoanna University Hospital, Sofia, Bulgaria; Medical University of Sofia, Bulgaria. radislav.nakov@gmail.com.Clinic of Nervous Diseases, Alexandrovska University Hospital, Sofia, Bulgaria.Tsaritsa Yoanna University Hospital, Sofia, Bulgaria; Medical University of Sofia, Bulgaria.Medical University of Sofia, Bulgaria; Clinic of Cardiology, Medical Institute of Ministry of Interior, Sofia, Bulgaria.Genetic and Medico- diagnostic Laboratory "Genica", Sofia, Bulgaria.Medical University of Sofia, Bulgaria; Genetic and Medico- diagnostic Laboratory "Genica", Sofia, Bulgaria.Medical University of Sofia, Bulgaria; Genetic and Medico- diagnostic Laboratory "Genica", Sofia, Bulgaria.Medical University of Sofia, Bulgaria; Clinic of Nervous Diseases, Alexandrovska University Hospital, Sofia, Bulgaria; Department of Cognitive Science and Psychology, New Bulgarian University, Sofia, Bulgaria.