1. Department of High-Risk Pregnancy, Clinic of Gynecology and Obstetrics “Narodni Front”, Belgrade, Serbia
2. Faculty of Medicine, University of Belgrade, Belgrade, Serbia
3. Department of Medical Biochemistry, Clinic of Gynecology and Obstetrics “Narodni Front”, Belgrade, Serbia
4. Department of Medical Biochemistry, Faculty of Pharmacy, University of Belgrade, Belgrade, Serbia
5. Institute for Medical Statistics and Informatics, University of Belgrade, Belgrade, Serbia
6. Division of Nephrology and Hypertension, Mayo Clinic, Rochester, USA