Mann, J. K., H. Byakwaga, X. T. Kuang, A. Q. Le, C. J. Brumme, P. Mwimanzi, S. Omarjee, et al. 2013. “Ability of HIV-1 Nef to downregulate CD4 and HLA class I differs among viral subtypes.” Retrovirology 10 (1): 100. doi:10.1186/1742-4690-10-100. http://dx.doi.org/10.1186/1742-4690-10-100.