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Effectiveness of cervical pessary compared to cervical cerclage with or without vaginal progesterone for the prevention of preterm birth in women with twin pregnancies and a short cervix: study protocol for a two-by-two factorial randomised clinical trial.
Dang VQ, He YT, Pham HN, Trieu TT, Bui TQ, Vuong NT, Nguyen LM, Nguyen DT, Le TV, Li W, Le CH, Mol BW, Vuong LN. Dang VQ, et al. Among authors: trieu tt. BMJ Open. 2020 Jun 16;10(6):e036587. doi: 10.1136/bmjopen-2019-036587. BMJ Open. 2020. PMID: 32554744 Free PMC article.