The Vanderbilt Therapeutics Clinical Research Site (VTCRS) is a group of caring professionals who are working together to make a positive contribution in our fight against AIDS. The VTCRS (formerly known as the ACTC) has been in operation since 1992 and is currently funded by the National Institutes of Health (NIH) and by the pharmaceutical industry. The Prinicipal Investigator, David Haas, is responsible for overall conduct and coordination of the program.