Authors
Aleksandar D. Lyubenov
aleksandar_ljubenov@yahoo.co.uk
Department of Obstetrics and Gynecology, Saint Marina University Hospital, Pleven, Bulgaria
Slavcho T. Tomov
Department of Midwifery, Medical University, Pleven, Bulgaria
Desislava K. Kiprova
Department of Obstetrics and Gynecology, Saint Marina University Hospital, Pleven, Bulgaria
Grigor A. Gorchev
Department of Obstetrics and Gynecology, Saint Marina University Hospital, Pleven, Bulgaria
Kameliya T. Tsvetanova
Department of Anaesthesiology and Resuscitation, Medical University, Pleven, Bulgaria