<?xml version="1.0" encoding="UTF-8"?><protocol_summary><protocol><id>13971</id><no>STUDY00004071</no><status>Open</status><title>An advanced functional MRI study of frontostriatal injury in adults with HIV</title><sponsor_type>National</sponsor_type><age_group>Adult</age_group><treatment_type>Basic Science</treatment_type><disease_site>Certain Infectious And Parasitic Diseases; Diseases Of The Blood And Blood-Forming Organs And Certain Disorders Involving The Immune Mechanism; Diseases Of The Nervous System; Mental And Behavioral Disorders</disease_site><PI>Jiang, Xiong</PI><institution>Georgetown University Medical Center; Lombardi Comprehensive Cancer Center</institution><management_group>GUMC Neurosciences</management_group></protocol><sipVersion>2026.1.0 Build 16</sipVersion><copyright> &lt;a href="https://advarra.com" target="_blank"&gt;&amp;copy; 2026 Advarra, Inc.&lt;/a&gt; </copyright></protocol_summary>