[1] Vrije Univ Amsterdam, Amsterdam UMC, Dept Reprod Med, Boelelaan 1118, NL-1081 HV Amsterdam, Netherlands
[2] Flinders Univ S Australia, Coll Med & Publ Hlth, Adelaide, Vic, Australia
[3] Onze Lieve Vrouw Hosp, Dept Obstet & Gynaecol, Amsterdam, Netherlands
[4] Univ Groningen, Univ Med Ctr Groningen, Dept Reprod Med & Gynaecol, Hanzeplein, Netherlands
[5] Jeroen Bosch Hosp, Dept Obstet & Gynaecol, sHertogenbosch, Netherlands
[6] Rijnstate Hosp, Dept Obstet & Gynaecol, Arnhem, Netherlands
[7] Franciscus Hosp, Dept Obstet & Gynaecol, Rotterdam, Netherlands
[8] Vrije Univ Amsterdam, Amsterdam UMC, Ctr Reprod Med, Amsterdam, Netherlands
[9] Zaans Med Ctr, Dept Obstet & Gynaecol, Zaandam, Netherlands
[10] VieCuri Med Ctr, Dept Obstet & Gynaecol, Venlo, Netherlands
[11] Hosp Gelderse Vallei, Dept Obstet & Gynaecol, Ede, Netherlands
[12] Elisabeth TweeSteden Hosp, Dept Obstet & Gynaecol, Tilburg, Netherlands
[13] Albert Schweitzer Hosp, Dept Obstet & Gynaecol, Dordrecht, Netherlands
[14] Maastricht UMC, Dept Obstet & Gynaecol, Maastricht, Netherlands
[15] Canisius Wilhelmina Hosp, Dept Obstet & Gynaecol, Nijmegen, Netherlands
[16] Scheper Hosp, Dept Obstet & Gynaecol, Emmen, Netherlands
[17] Vrouwenkliniek Zuidoost, Amsterdam, Netherlands
[18] Ropcke Zweers Hosp, Hardenberg, Netherlands
[19] Monash Univ, Dept Obstet & Gynaecol, Clayton, Vic, Australia