Fetal fibronectin status and cervical length in women with threatened preterm labor and the effectiveness of maintenance tocolysis

Carolien Roos^*, Jolande Y. Vis, Hubertina C.J. Scheepers, Kitty W.M. Bloemenkamp, Hans J.J. Duvekot, Jim Van Eyck, Christianne De Groot, Joke H. Kok, Brent C. Opmeer, Martijn A. Oudijk, Dimitri N.M. Papatsonis, Martina M. Porath, Krystyna Sollie, Marc E.A. Spaanderman, Fred K. Lotgering, Joris A.M. Van Der Post, Ben Willem J. Mol

^*Corresponding author for this work