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Allen JK, Xu X.Allen JK, et al. Among authors: xu x.Crit Care Nurs Clin North Am. 1997 Dec;9(4):497-509.Crit Care Nurs Clin North Am. 1997.PMID: 9444173Review.
Brown TT, Xu X, John M, Singh J, Kingsley LA, Palella FJ, Witt MD, Margolick JB, Dobs AS.Brown TT, et al. Among authors: xu x.AIDS Res Ther. 2009 May 13;6:8. doi: 10.1186/1742-6405-6-8.AIDS Res Ther. 2009.PMID: 19439092Free PMC article.