<?xml version="1.0" encoding="UTF-8"?><protocol_summary><protocol><id>10394</id><no>PL101-HD301</no><status>Open (affiliates only)</status><title>A Phase 3, Randomized, Double-Blind, Placebo-Controlled, Parallel Arm, Multicenter Study Evaluating the Efficacy and Safety of Pridopidine in Patients with Early Stage of Huntington Disease</title><nct_id>NCT04556656</nct_id><sponsor_type>Industrial</sponsor_type><age_group>Adult</age_group><treatment_type>Treatment</treatment_type><phase>III</phase><disease_site>Other</disease_site><PI>Anderson, Karen</PI><institution>Georgetown University Medical Center; Lombardi Comprehensive Cancer Center</institution><management_group>GUMC Huntington Disease Care Ed &amp; Rsch Center; GUMC PFS; GUMC Psychiatry</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>