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
Lan N Vuong, Vinh Q Dang, Yen TN He and 8 more
BMJ Open · 2020
doi:10.1136/bmjopen-2019-036587 (opens in a new tab)
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