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Cheung KW, Seto MTY, Ng EHY. Early universal use of oral progesterone for prevention of preterm births in singleton pregnancy (SINPRO study): protocol of a multicenter, randomized, double-blind, placebo-controlled trial. Trials. 2020 Jan 30;21(1):121. PMID: 32000820; PMCID: PMC6993330. |