 Each time point baseline, 3 months and 9 months consists of 2 participant sessions. Session 1 at baseline is for the purposes of recruiting and determining if participants meet study criteria; during all visits, study criteria are reviewed to ensure that enrolled participants are still eligible. After determining eligibility, study information is explained by the research assistant and consent is then obtained. Additional psychiatric and substance use assessment and neurological and will be performed. Blood and urine specimens will be obtained and sent to lab for measurement of immunological, virologic, and hepatic status and other biomarkers. The remainder of the blood specimens will be frozen and banked for future analyses. All blood specimens banks for future analyses will be deidentified. A neurocognitive assessment performed by a research assistant. The duration will be approximately 120 minutes. Session 2 will occur within one week of visit one. It will consist of an MRI scan lasting approximately 50 minutes. Functional imaging will be conducted during this MRI time. All participants will undergo all procedures at baseline, and three and nine months. 