<?xml version="1.0" encoding="UTF-8"?><protocol_summary><protocol><id>14592</id><no>ALXN-MG-501</no><status>Open</status><title>Long-Term, Observational, Global Registry of Patients With Generalized Myasthenia Gravis Who Have Received Treatment With Complement C5 Inhibition Therapies</title><nct_id>NCT04202341</nct_id><sponsor_type>Industrial</sponsor_type><age_group>Adult</age_group><treatment_type>Observational</treatment_type><disease_site>Other</disease_site><PI>Streicher, Nicholas</PI><institution>MedStar Health and GUMC; MedStar Health at Chevy Chase; MedStar Health at McLean VA; Medstar Washington Hospital Center</institution><management_group>MedStar Neuroscience &amp; Rehab Research Network</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>