Progesterone for the prevention of preterm birth in women with multiple pregnancies: the AMPHIA trial by Scheepers Hubertina CJ, Santema Job G, van Oirschot Charlotte M, Offermans Jos PM, Mol Ben WJ, Hummel Pieter, Hasaart Tom HM, Erwich Jan Jaap HM, Duvekot Johannes J, Boer Kees, Bloemenkamp Kitty WM, Lim Arianne C, Schöls Willem A, Vandenbussche Frank PHA, Wouters Maurice GAJ, Bruinse Hein W

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Pessaries in multiple pregnancy as a prevention of preterm birth: the ProTwin Trial by Porath Martina, Spaanderman Marc, Duvekot Johannes J, Willekes Christine, Scheepers Hubertina CJ, Lim Arianne C, van der Post Joris AM, Papatsonis Dimitri NM, Kwee Anneke, Bloemenkamp Kitty WM, Bekedam Dick J, Hegeman Maud A, van Eyck Jim, Haak Monique C, van Pampus Marielle G, Bruinse Hein W, Mol Ben Willem J

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Correction: Pessaries in multiple pregnancy as a prevention of preterm birth: the ProTwin Trial by Liem Sophie MS, Bekedam Dick J, Bloemenkamp Kitty WM, Kwee Anneke, Papatsonis Dimitri NM, van der Post Joris AM, Lim Arianne C, Scheepers Hubertina CJ, Willekes Christine, Duvekot Johannes J, Spaanderman Marc, Porath Martina, van Eyck Jim, Haak Monique C, van Pampus Marielle G, Bruinse Hein W, Mol Ben Willem J, Hegeman Maud A

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Progestogens to prevent preterm birth in twin pregnancies: an individual participant data meta-analysis of randomized trials by Schuit Ewoud, Stock Sarah, Groenwold Rolf HH, Maurel Kimberly, Combs C Andrew, Garite Thomas, Spong Cathy Y, Thom Elizabeth A, Rouse Dwight J, Caritis Steve N, Saade George R, Zachary Julia M, Norman Jane E, Rode Line, Klein Katharina, Tabor Ann, Çetingöz Elçin, Morrison John C, Magann Everett F, Briery Christian M, Serra Vicente, Perales Alfredo, Meseguer Juan, Nassar Anwar H, Lim Arianne C, Moons Karel GM, Kwee Anneke, Mol Ben Willem J

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