Inclusion Criteria:

- All HIV-infected patients treated with RAL in the course of ordinary clinical
practice at the clinics and medical centers of Kaiser Permanente (KP) during the
study period will be included in the study

- Subjects must have at least one year of continuous membership with KP prior to index
date to allow for the assessment of medical and treatment history

Exclusion Criteria:

- Patients less than 18 years of age

- KP HIV-infected patients who do not receive their medications through the KP pharmacy
system

- KP HIV-infected patients who do not receive their laboratory examinations through the
KP system

- Patients participating in the phase III or expanded access program