Distinct evolutionary pressures underlie diversity in simian immunodeficiency virus and human immunodeficiency virus lineages.
Fischer W, Apetrei C, Santiago ML, Li Y, Gautam R, Pandrea I, Shaw GM, Hahn BH, Letvin NL, Nabel GJ, Korber BT. Distinct evolutionary pressures underlie diversity in simian immunodeficiency virus and human immunodeficiency virus lineages. J Virol. 2012 Dec; 86(24):13217-31.