Regional differences in prevalence of HIV-1 discordance in Africa and enrollment of HIV-1 discordant couples into an HIV-1 prevention trial. oleh Jairam R Lingappa, Barrot Lambdin, Elizabeth Ann Bukusi, Kenneth Ngure, Linda Kavuma, Mubiana Inambao, William Kanweka, Susan Allen, James N Kiarie, Joseph Makhema, Edwin Were, Rachel Manongi, David Coetzee, Guy de Bruyn, Sinead Delany-Moretlwe, Amalia Magaret, Nelly Mugo, Andrew Mujugira, Patrick Ndase, Connie Celum, Partners in Prevention HSV-2/HIV Transmission Study Group