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Effectiveness of progestogens to improve perinatal outcome in twin pregnancies: an individual participant data meta-analysis.
Schuit E, Stock S, Rode L, Rouse DJ, Lim AC, Norman JE, Nassar AH, Serra V, Combs CA, Vayssiere C, Aboulghar MM, Wood S, Atetingaz E, Briery CM, Fonseca EB, Worda K, Tabor A, Thom EA, Caritis SN, Awwad J, Usta IM, Perales A.
BJOG 2015;122:27-37. pdf -
Prevention of preterm delivery in twin gestations (PREDICT): A multicentre randomised placebo-controlled trial on the effect of vaginal micronised progesterone.
Rode L, Klein K, Nicolaides K, Krampl-Bettelheim E, Tabor A.
Ultrasound Obstet Gynecol 2011;38:272-80.