Prevention of preterm delivery in twin gestations (PREDICT): A multicentre randomised placebo-controlled trial on the effect of vaginal micronised progesterone.
Department of Fetal Medicine and Ultrasound 4002, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark; University of Copenhagen, Faculty of Health Sciences, Denmark. linerode@dadlnet.dk.