Emory School of Medicine, Emory University, Atlanta, GA, USA. University of California, San Diego, La Jolla, CA, USA. HIV Neurobehavioral Research Center and Antiviral Research Center, University of California, San Diego, 220 Dickinson Street, Suite A, San Diego, CA, 92103, USA. Washington University School of Medicine, Washington University, St. Louis, MO, USA. University of Washington, Seattle, WA, USA. University of Texas Medical Branch, University of Texas System, Galveston, TX, USA. John Hopkins School of Medicine, Johns Hopkins University, Baltimore, MD, USA. The Mount Sinai Hospital, New York, NY, USA. University of California, San Diego, La Jolla, CA, USA. sletendre@ucsd.edu. HIV Neurobehavioral Research Center and Antiviral Research Center, University of California, San Diego, 220 Dickinson Street, Suite A, San Diego, CA, 92103, USA. sletendre@ucsd.edu.