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Cervical cerclage for preterm birth prevention in twin gestation with short cervix: a retrospective cohort study.
Houlihan C, Poon LC, Ciarlo M, Kim E, Guzman ER, Nicolaides KH.
Ultrasound Obstet Gynecol 2016;48:752-6. pdf -
Cervical pessary placement for prevention of preterm birth in unselected twin pregnancies: a randomized controlled trial.
Nicolaides KH, Syngelaki A, Poon LC, de Paco Matallana C, Plasencia W, Molina FS, Picciarelli G, Tul N, Celik E, Lau TK, Conturso R.
Am J Obstet Gynecol 2016;214:3.e1-9. pdf