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Silva-Santisteban A, Raymond HF, Salazar X, Villayzan J, Leon S, McFarland W, Caceres CF.Silva-Santisteban A, et al. Among authors: leon s.AIDS Behav. 2012 May;16(4):872-81. doi: 10.1007/s10461-011-0053-5.AIDS Behav. 2012.PMID: 21983694
Brown B, Davtyan M, Galea J, Chow E, Leon S, Klausner JD.Brown B, et al. Among authors: leon s.Viruses. 2012 Dec 18;4(12):3851-8. doi: 10.3390/v4123851.Viruses. 2012.PMID: 23250451Free PMC article.Review.