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Ma WG, Zheng J, Dong SB, Lu W, Sun K, Qi RD, Liu YM, Zhu JM, Chang Q, Sun LZ.Ma WG, et al. Among authors: dong sb.Ann Cardiothorac Surg. 2013 Sep;2(5):621-8. doi: 10.3978/j.issn.2225-319X.2013.09.06.Ann Cardiothorac Surg. 2013.PMID: 24109570Free PMC article.
Zhang K, Pan XD, Dong SB, Zheng J, Xu SD, Liu YM, Zhu JM, Sun LZ.Zhang K, et al. Among authors: dong sb.J Int Med Res. 2020 Nov;48(11):300060520968450. doi: 10.1177/0300060520968450.J Int Med Res. 2020.PMID: 33207998Free PMC article.