Cluster 77: antiretroviral combination hiv ineligible positive immunodeficiency virus human therapy patients Cluster 1044: individuals antiretroviral combination hiv ineligible positive immunodeficiency virus human therapy Cluster 1151: hiv load viral cd immunodeficiency antiretroviral virus human positive haart Cluster 1213: antiretroviral combination undertaken hiv therapy studies indicated appropriate immunodeficiency virus Cluster 1312: positivity antiretroviral combination hiv immunodeficiency virus human known therapy know