Patients who are enrolled on protocols CPCRA 006 and/or 007 are given a baseline questionnaire to complete during the enrollment visit for the qualifying treatment protocol. The survey concerns the patient's work, primary language, support systems, residence status, perception of disease and treatments, and substance use. At 4-month follow-up visits, patients are asked to complete a self-report questionnaire, which assesses the patient's perceptions of difficulties in protocol compliance requirements, clinic/office visits, and health beliefs. The duration of patients on this study will be defined by the qualifying protocol requirements.