1. Calef C, Mokili J, O’Connor DH, Watkins DI, Korber BT. Numbering positions in SIV relative to SIVMM239. In: Kuiken CL, Foley B, Hahn B, Korber B, Marx PA, McCutchan F, Mellors JW, Wolinsky S, editors. HIV sequence compendium 2001. Los Alamos: Los Alamos National Laboratory; 2001. p. 171–81.
2. Chen Z, Luckay A, Sodora DL, Telfer P, Reed P, Gettie A, Kanu JM, Sadek RF, Yee J, Ho DD, Zhang L, Marx PA. Human immunodeficiency virus type 2 (HIV-2) seroprevalence and characterization of a distinct HIV-2 genetic subtype from the natural range of simian immunodeficiency virus-infected sooty mangabeys. J Virol. 1997;71:3953–60.
3. Damond F, Worobey M, Campa P, Farfara I, Colin G, Matheron S, Brun-Vézinet F, Robertson DL, Simon F. Identification of a highly divergent HIV type 2 and proposal for a change in HIV type 2 classification. AIDS Res Hum Retroviruses. 2004;20:666–72.
4. Fan J, Negroni M, Robertson DL. The distribution of HIV-1 recombination breakpoints. Infect Genet Evol. 2007;7:717–23.
5. Gao F, Yue L, White AT, Pappas PG, Barchue J, Hanson AP, Greene BM, Sharp PM, Shaw GM, Hahn BH. Human infection by genetically diverse SIVSM-related HIV-2 in West Africa. Nature. 1992;358:495–9.