Gert-Jan van Baaren 1, Jolande Vis 1, Femke Wilms 2, Martijn Oudijk 3, Anneke Kwee 3, Martina Porath 4, Guid Oei 4, Hubertina Scheepers 2, Marc Spaanderman 2, Kitty Bloemenkamp 5, Monique Haak 5, Antoinette Bolte 6, Caroline Bax 6, Jérôme Cornette 7, Johannes Duvekot 7, Maureen Franssen 8, Krystyna Sollie 8, Frank Vandenbussche 9, Mallory Woisky 9, William Grobman 10, Joris van der Post 1, Patrick Bossuyt 11, Brent Opmeer 12, Ben Mol 1
1 Academic Medical Center, Department of Obstetrics and Gynecology, Amsterdam, Netherlands
2 Maastricht University Medical Center, Department of Obstetrics and Gynecology, Maastricht, Netherlands
3 University Medical Center Utrecht, Department of Obstetrics and Gynecology, Utrecht, Netherlands
4 Máxima Medical Center, Department of Obstetrics and Gynecology, Veldhoven, Netherlands
5 Leiden University Medical Center, Department of Obstetrics and Gynecology, Leiden, Netherlands
6 VU University Medical Center, Department of Obstetrics and Gynecology, Amsterdam, Netherlands
7 Erasmus Medical Center, Department of Obstetrics and Gynecology, Rotterdam, Netherlands
8 University Medical Center Groningen, Department of Obstetrics and Gynecology, Groningen, Netherlands
9 Radboud University Nijmegen Medical Center, Department of Obstetrics and Gynecology, Nijmegen, Netherlands
10 Northwestern University Medical School, Department of Gynecology and Obstetrics, Chicago, IL
11 Academic Medical Center, Clinical Epidemiology, Biostatistics and Bioinformatics, Amsterdam, Netherlands
12 Academic Medical Center, Clinical Research Unit, Amsterdam, Netherlands