[1] Amphia Ziekenhuis, Breda, Netherlands
[2] Acad Med Ctr, Dept Med Informat, Amsterdam, Netherlands
[3] Amsterdam Univ Med Ctr AMC, Dept Obstet & Gynaecol, Amsterdam, Netherlands
[4] Monash Univ, Dept Obstet & Gynaecol, Clayton, Vic, Australia
[5] Ikazia Hosp, Dept Obstet & Gynaecol, Rotterdam, Netherlands