The Adult AIDS Clinical Trials Group(AACTG),the largest HIV clinial trials organization in the world, plays a major role in setting standards of care for HIV infection and opportunistic diseases related to HIV/AIDS in the United States and the developed world.The AACTG is commposed of, and directed by,leading clinical scientists in HIV/AIDS therapeutic research.The AACTG is funded by the Department of Health and Human Services,National In stitutes of Health through the National Institute of Allergy and Infectious Diseases.