1. Clinic of Obstetrics and Gynecology “Narodni front”, Belgrade, Serbia
2. Clinic of Obstetrics and Gynecology “Narodni front”, Belgrade, Serbia + University of Belgrade, Faculty of Medicine, Belgrade, Serbia
3. Institute for Cardiovascular Disease “Dedinje“, Belgrade, Serbia
4. University of Belgrade, Faculty of Medicine, Belgrade, Serbia + Clinical Center of Serbia, Institute for Cardiology, Belgrade, Serbia