Authors
Z. Kirovakov
Department of Midwifery Care, Faculty of Health care, Medical University – Pleven, Bulgaria
University Multiprofile Hospital for Active Treatment – Burgas, Bulgaria
N. Hinkova
Department of Midwifery Care, Faculty of Health care, Medical University – Pleven, Bulgaria
E. Konova
Department of Clinical Laboratory, Allergology and Clinical Immunology, Medical University – Pleven, Bulgaria
