doi.org/10.1186/1471-2393-12-37, hdl.handle.net/1765/58366
BMC Pregnancy and Childbirth
Department of Gynaecology & Obstetrics

Liem, S., Bekedam, D., Bloemenkamp, K., Kwee, A., Papatsonis, D., van der Post, J., Lim, A., Scheepers, H., Willekes, C., Duvekot, H., Spaanderman, M. E. A., Porath, M., van Eyck, J., Haak, M., van Pampus, M., Bruinse, H., Mol, B.& Hegeman, M. (2012). Correction: Pessaries in multiple pregnancy as a prevention of preterm birth: the ProTwin Trial. BMC Pregnancy and Childbirth, 12.https://doi.org/10.1186/1471-2393-12-37