Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity and on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity AND actively being treated with highly active antiretroviral therapy (HAART) Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Know human immunodeficiency virus (HIV) positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity and on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Subject has known Human Immunodeficiency Virus (HIV) positivity (subjects who are receiving antiretroviral therapy for HIV disease). Phase I and Arm 1 of Phase II: Known human immunodeficiency virus (HIV)-positivity and on combination antiretroviral therapy; Arms 2 and 3 of Phase II: patients with HIV infection and antiretroviral therapy are not excluded Known human immunodeficiency virus (HIV)-positivity and on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity on combination antiretroviral therapy Known human immunodeficiency virus (HIV)-positivity and on combination antiretroviral therapy