[1] Clin Ctr Serbia, Clin Gynecol & Obstet, Belgrade, Serbia
[2] Univ Belgrade, Inst Med Stat & Informat, Fac Med, Belgrade 11001, Serbia
[3] Univ Belgrade, Inst Human Genet, Fac Med, Belgrade 11001, Serbia
[4] Univ Belgrade, Inst Epidemiol, Fac Med, Belgrade 11001, Serbia