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Cheng J, Ruan X, Zhou Q, Li Y, Du J, Jin F, Wang H, Gu M, Mueck AO.Cheng J, et al. Among authors: ruan x.Gynecol Endocrinol. 2021 Mar;37(3):240-245. doi: 10.1080/09513590.2020.1760242. Epub 2020 May 5.Gynecol Endocrinol. 2021.PMID: 32367735Free article.