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(杜明昆)(郑怀美)(郑苏华)(陈帼君)AComparativeStudyontheContraceptionEfficacyandSafetyoftheProgesteroneReleasingContraceptiveVaginalRingand...
(Du Mingkun) (Zheng Hua Mei) (Zheng Suhua) (Chen Jun) AComparativeStudyontheContraceptionEfficacyandSafetyoftheProgesteroneReleasingContraceptiveVaginalRingand