Single-dose tenofovir and emtricitabine for reduction of viral resistance to non-nucleoside reverse transcriptase inhibitor drugs in women given intrapartum nevirapine for perinatal HIV prevention: an open-label randomised trial. - Chi, Benjamin H.; Sinkala, Moses; Mbewe, Felistas; Cantrell, Ronald A.; Kruse, Gina; Chintu, Namwinga; Aldrovandi, Grace M.; Stringer, Elizabeth M.; Kankasa, Chipepo; Safrit, Jeffrey T.; Stringer, Jeffrey S.A. (Lancet, 2007)