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Choi YB, Nicholas J.Choi YB, et al.Virology. 2010 Feb 20;397(2):369-78. doi: 10.1016/j.virol.2009.11.024. Epub 2009 Dec 9.Virology. 2010.PMID: 20004457Free PMC article.
Xiang Q, Ju H, Li Q, Mei SC, Chen D, Choi YB, Nicholas J.Xiang Q, et al. Among authors: choi yb.J Virol. 2018 Mar 14;92(7):e02003-17. doi: 10.1128/JVI.02003-17. Print 2018 Apr 1.J Virol. 2018.PMID: 29343584Free PMC article.