531: Long-term effects of cervical pessary for preterm birth prevention in twin pregnancy with short cervix: a 3 years follow-up of the ProTwin trial Janneke van 't Hooft, Cuny Cuijpers, Johanna H. van der Lee, Sophie Liem, Ewoud Schuit, Brent C. Opmeer, Leonie Steenis, Aleid G. van Wassenaer-Leemhuis, Anneloes L. van Baar, Dick Bekedam, Ben Willem J. Mol, Cornelieke van der Beek American Journal of Obstetrics & Gynecology Volume 214, Issue 1, (January 2016) DOI: 10.1016/j.ajog.2015.10.575 Copyright © 2016 Terms and Conditions
American Journal of Obstetrics & Gynecology 2016 214, DOI: (10. 1016/j American Journal of Obstetrics & Gynecology 2016 214, DOI: (10.1016/j.ajog.2015.10.575) Copyright © 2016 Terms and Conditions