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Tchetgen EJT, Wang L, Sun B.Tchetgen EJT, et al.Stat Sin. 2018 Oct;28(4):2069-2088. doi: 10.5705/ss.202016.0325.Stat Sin. 2018.PMID: 33994754Free PMC article.
Miles CH, Shpitser I, Kanki P, Meloni S, Tchetgen EJT.Miles CH, et al. Among authors: tchetgen ejt.J Am Stat Assoc. 2017;112(520):1443-1452. doi: 10.1080/01621459.2017.1295862. Epub 2018 Jan 26.J Am Stat Assoc. 2017.PMID: 32042214Free PMC article.