Authors
A. Nikolov
Division of Medicine, Cardiovascular Research Working Group, Institute for Scientific Research, Medical University – Pleven, Bulgaria
M. Tzekova
Medical University – Pleven, Bulgaria
K. Kostov
Medical University – Pleven, Bulgaria
A. Kostadinovska
Medical University – Pleven, Bulgaria
S. Blazheva
Department of Clinical Laboratory, Clinical Immunology and Allergology, Medical University – Pleven, Bulgaria
