[1] Univ Belgrade, Fac Med, Clin Gynecol & Obstet, Belgrade 11000, Serbia
[2] Clin Ctr Dragisa Misovic Dedinje, Clin Gynecol & Obstet, Belgrade 11000, Serbia
[3] Univ Belgrade, Dept Anesthesiol, Fac Med, Belgrade 11000, Serbia
[4] Clin Gynecol & Obstet Narodni Front, Belgrade 11000, Serbia
[5] Univ Belgrade, Inst Med Stat & Informat, Fac Med, Belgrade 11000, Serbia
[6] Clin Ctr Serbia, Dept Anesthesiol, Clin Gynecol & Obstet, Belgrade 11000, Serbia
[7] Univ Belgrade, Inst Pharmacol Clin Pharmacol & Toxicol, Fac Med, Belgrade 11000, Serbia
[8] Mayo Clin, Dept Internal Med, Div Nephrol & Hypertens, Rochester, MN 55904 USA