title: Cervical pessary placement for prevention of preterm birth in unselected twin pregnancies: a randomized controlled trial.
authors.affiliation: Department of Obstetrics Hospital Universitari, Hospital Vall d'Hebron of Barcelona, Universitat Autonoma de Barcelona, Barcelona 08036, Spain.
authors.forename: Maria
authors.initials: M
authors.lastname: Goya
authors.affiliation: Department of Obstetrics Hospital Universitari, Hospital Vall d'Hebron of Barcelona, Universitat Autonoma de Barcelona, Barcelona 08036, Spain. Electronic address: lcaberor@sego.es.
authors.forename: Luis
authors.initials: L
authors.lastname: Cabero
mesh_terms: D005260:Female; D006801:Humans; D010570:Pessaries; D011247:Pregnancy; D059285:Pregnancy, Twin; D047928:Premature Birth / Q000517:prevention & control*