[1] Acad Med Ctr, Dept Obstet & Gynaecol, NL-1105 DE Amsterdam, Netherlands
[2] Acad Med Ctr, Emmas Childrens Hosp, Dept Neonatol, NL-1105 DE Amsterdam, Netherlands
[3] Univ Limburg, Acad Hosp Maastricht, Dept Obstet & Gynaecol, Maastricht, Netherlands
[4] Martini Hosp Groningen, Dept Obstet & Gynaecol, Groningen, Netherlands
[5] Univ Adelaide, Robinson Inst, Sch Paediat & Reprod Hlth, Adelaide, SA, Australia