Gert-Jan van Baaren 1, Jolande Vis 1, Femke Wilms 2, Martijn Oudijk 3, Anneke Kwee 3, Martina Porath 4, Hubertina C.J. Scheepers 2, Marc E.A. Spaanderman 2, Kitty W.M. Bloemenkamp 5, Annemieke J.M. Middeldorp 5, Antoinette Bolte 6, Caroline Bax 6, Jérôme M.J. Cornette 7, Johannes Duvekot 7, Bas W.A. Nij Bijvanck 8, Jim van Eijck 8, Maureen T.M. Franssen 9, Krystyna Sollie 9, Frank P.H.A. Vandenbussche 10, Mallory Woiski 10, Joris A.M. van der Post 1, Patrick M.M. Bossuyt 11, Brent Opmeer 11, Ben W.J. Mol 1
1 Academic Medical Center, Dept. Obstetrics & Gynecology, Amsterdam, Netherlands
2 Maastricht University Medical Center, Dept. Obstetrics & Gynecology, Maastricht, Netherlands
3 University Medical Center Utrecht, Dept. Obstetrics & Gynecology, Utrecht, Netherlands
4 Maxima Medical Center, Dept. Obstetrics & Gynecology, Veldhoven, Netherlands
5 Leiden University Medical Center, Dept. Obstetrics & Gynecology, Leiden, Netherlands
6 VU University Medical Center, Dept. Obstetrics & Gynecology, Amsterdam, Netherlands
7 Erasmus University Medical Center, Dept. Obstetrics & Gynecology, Rotterdam, Netherlands
8 Isala Clinics, Dept. Obstetrics & Gynecology, Zwolle, Netherlands
9 University Medical Center Groningen, Dept. Obstetrics & Gynecology, Groningen, Netherlands
10 Radboud University Medical Center, Dept. Obstetrics & Gynecology, Nijmegen, Netherlands
11 Academic Medical Center, Clinical Research Unit, Amsterdam, Netherlands