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Zhu L, Tong X, Sun J.Zhu L, et al. Among authors: tong x.Lifetime Data Anal. 2008 Jun;14(2):167-78. doi: 10.1007/s10985-007-9075-8.Lifetime Data Anal. 2008.PMID: 18165933
Tong X, Zhu L, Sun J.Tong X, et al.Lifetime Data Anal. 2009 Jun;15(2):197-215. doi: 10.1007/s10985-008-9104-2. Epub 2008 Nov 26.Lifetime Data Anal. 2009.PMID: 19034646
Zhu L, Sun J, Tong X, Srivastava DK.Zhu L, et al. Among authors: tong x.Lifetime Data Anal. 2010 Oct;16(4):478-90. doi: 10.1007/s10985-010-9158-9. Epub 2010 Mar 10.Lifetime Data Anal. 2010.PMID: 20217474
Jin J, Zhu L, Tong X, Ness KK.Jin J, et al. Among authors: tong x.Commun Stat Theory Methods. 2017;46(2):616-627. doi: 10.1080/03610926.2014.1002934. Epub 2016 Feb 23.Commun Stat Theory Methods. 2017.PMID: 27840548Free PMC article.