[1] Univ Med Ctr Utrecht, Dept Obstet, Utrecht, Netherlands
[2] Vrije Univ Amsterdam, Med Ctr, Sect Community Genet, Dept Clin Genet, Amsterdam, Netherlands
[3] Vrije Univ Amsterdam, Med Ctr, EMGO Inst Hlth & Care Res, Amsterdam, Netherlands
[4] Natl Inst Publ Hlth & Environm RIVM, Ctr Infect Dis Res Diagnost & Screening IDS, Bilthoven, Netherlands
[5] Netherlands Inst Hlth Serv Res, Utrecht, Netherlands
[6] Univ Utrecht, Fac Social & Behav Sci, Utrecht, Netherlands