宫内节育器宫腔形Cu300、TCu220C、TCu380A放置10年的临床比较性研究
궁내절육기궁강형Cu300、TCu220C、TCu380A방치10년적림상비교성연구
A multicentre comparative clinical study of uterine cavity shaped device Cu300, TCu220C and TCu380A in ten years
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