Authors
Department of Obstetrics and Gynecology, MU – Varna, Bulgaria
SBAGAL “Prof. Dr. Dimitar Stamatov,” Varna, Bulgaria
Emil Kovachev
Department of Obstetrics and Gynecology, MU – Varna, Bulgaria
SBAGAL “Prof. Dr. Dimitar Stamatov,” Varna, Bulgaria
Zhivko Zhekov
Department of Obstetrics and Gynecology, MU – Varna, Bulgaria
SBAGAL “Prof. Dr. Dimitar Stamatov,” Varna, Bulgaria