Authors
Nikola K. Popovski
Clinic of Obstetrics and Gynecology, University Hospital - Pleven
Asparuh G. Nikolov
Department of Obstetrics and Gynaecology, Medical University - Pleven
Yordan D. Popov
Division of Medicine, Cardiovascular Research Working Group, Institute for Scientific Research, Medical University - Pleven
Svetla O. Blazheva
Department of Clinical Laboratory, Clinical Immunology and Allergology, Medical University - Pleven