A Study to Investigate the Efficacy and Safety of Efgartigimod PH20 SC in Adult Participants With Active Idiopathic Inflammatory Myopathy.

Instituto Peruano Del Hueso Y La Articulacion Sac-Privado-Lima, Centro De Investigacion Iphar, Lima

Hospital Nacional Cayetano Heredia, Lima

Chung Shan Medical University Hospital, Taichung

Semmelweis Egyetem, Institute of Genomic Medicine and Rare Disorders, Budapest

Allgemeines Krankenhaus der Stadt Wien (AKH Wien), Vienna

Copenhagen University Hospital-Rigshospitalet University Hospital, Copenhagen

Cyprus Institute of Neurology and Genetics, Nicosia

Universitair Ziekenhuis Leuven Gasthuisberg Campus, Leuven

Centre Hospitalier Universitaire Sart Tilman, Liège

Medical Centre Artmed, Plovdiv

Multiprofile hospital for active treatment Kaspela EOOD, Plovdiv

Hogar Clinica San Juan de Dios, Arequipa

Debreceni Egyetem - University of Debrecen, Debrecen

The Wesley Medical Research, Auchenflower

Consultora Integral de Salud, Córdoba

Medical University Innsbruck, Innsbruck

Centre Hospitalier Universitaire de Charleroi, Charleroi

Fiona Stanley Hospital, Murdoch

Neurocenter of Southern Switzerland, Lugano

AZ Sint Lucas Gent-Campus Sint Lucas, Ghent

Hospital for Special Surgery, New York

Charite - Universitaetsmedizin Berlin, Berlin

Azienda Ospedaliero Universitaria Citta della Salute e della Scienza di Torino - Presidio Molinette, Torino

Chulalongkorn University - Faculty of Medicine - King Chulalongkorn Memorial Hospital (KCMH), Bangkok

Phramongkutklao Hospital, Bangkok

Ramathibodi hospital, Bangkok

Siriraj Hospital, Mahidol University of Internal medicine, Bangkok

Clinical Center of Serbia, Belgrade

Institute of Rheumatology, Belgrade

Northwell Health, Great Neck

Thammasat University Hospital, Pathum Thani

Attikon General University Hospital, Athens

Investigaciones Clinicas S.A.C., Lima

University of Pittsburg Medical Center, Pittsburgh

Ajou University Hospital, Suwon

Karolinska Universitestssjukhus Solna, Stockholm

Georgetown University Hospital, Washington D.C.

IRCCS Istituto Clinico Humanitas - Rheumatology, Rozzano

Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) - Ospedale San Raffaele Hospital, Milan

Universitaetsklinikum Hamburg-Eppendorf, Hamburg

Johns Hopkins Medicine - Johns Hopkins Myositis Center, Baltimore

Gachon University Gil Medical Center, Incheon

San Matteo Hospital, Pavia

Hospital Universitario Ramon y Cajal, Madrid

Universidad Autonoma de Madrid (UAM) - Hospital Universitario La Paz, Madrid

Carolina Arthritis Associates, Wilmington

First Affiliated Hospital of Shanxi Medical College, Shanxi

Augusta University, Augusta

Emory University Hospital, The Emory Clinic, Atlanta

Bnai Zion Medical Center, Haifa

Mayo Clinic, Jacksonville

ASU FC - Presidio Ospedaliero Universitario Santa Maria della Misericordia, Udine

University of South Florida (USF) - Morsani Center (USF Health Carol and Frank Morsani Center for Advanced Healthcare), Tampa

Chungnam National University Hospital (CNUH), Daejeon

Hospital Do Meixoeiro, Vigo

Universitatsmedizin Gottingen - Georg-August-Universitat, Göttingen

Azienda Ospedaliera Universitaria Integrata di Verona - Ospedale Borgo Roma, Verona

Khon Kaen University, Khon Kaen

Universitaetsklinikum Duesseldorf, Düsseldorf

China Medical University and Hospital, Taichung

Taichung Veterans General Hospital, Taichung

Necmettin Erbakan University Meram Medical Faculty, Konya

IRCCS Arcispedale Santa Maria Nuova, Reggio Emilia

The Ohio State University, Columbus

Cleveland Clinic - Main Campus, Cleveland

Meir Medical Center, Kfar Saba

Rheumazentrum Ruhrgebiet, Herne

University of Ioannina Medical School, Ioannina

Hospital Universitario y Politecnico La Fe, Valencia

St. Josef-Stift Sendenhorst, Sendenhorst

Michigan State University - Neurology, East Lansing

Rabin Medical Center - Beilinson Campus (Beilinson and Hasharon Hospital), Petah Tikva

Azienda Ospedaliero Universitaria Careggi, Florence

Hospital of Lithuanian University of Health Sciences Kauno klinikos, Kaunas

Maharaj Nakorn Chiang Mai Hospital, Chiang Mai University, Chiang Mai

Sheba Medical Center - Rheumatology, Ramat Gan

St. Paul Rheumatology, PA, Saint Paul

A.O. Universitaria Pisana, Pisa

Northwestern Memorial Hospital, Chicago

Washington University School of Medicine, St Louis

University Of Kansas Medical Center, Kansas City

Hopitaux Universitaire de Strasbourg-Centre de References des Maladies Autoimmunes, Strasbourg

Universitatsmedizin Mannheim, Mannheim

Hopital Edouard Herriot, Lyon

Azienda Ospedaliera Universitaria Policlinico Consorziale Di Bari - Rheumatology, Bari

Universitaetsklinikum Tuebingen (UKT), Tübingen

Mercy Hospital - Mercy Clinic Neurology Oklahoma City - Neurology, Oklahoma City

Reference Center Neuro-Muscular Diseases - CHU Paris Group Hospitalier La Pitie Salpetriere-Charles Foix, Paris

Centre Hospitalier Universitaire (CHU) Hopitaux de Rouen, Rouen

McGovern Medical School -The University of Texas Health Science Center at Houston, Houston

Nerve And Muscle Center Of Texas, Houston

Austin Neuromuscular Center, Austin

Denver Arthritis Clinic, Denver

Ludwig-Maximilians-Universitat Munchen Friedrich-Baur-Institut Neurologische Klinik und Poliklinik, München

Neuromuscular Research Center, Phoenix

HonorHealth Neurology - Bob Bove Neuroscience Institute - Neurology, Scottsdale

Universitatsklinikum Ulm - Standort Oberer Eselsberg, Ulm

University of Southern California Norris Comprehensive Cancer Center, Los Angeles

Attune Health Research, Inc, Beverly Hills

Profound Research LLC - Oceanside, Oceanside

Narodny ustav reumatickych chorob, Piešťany

Eisenhower Medical Center, Rancho Mirage

University of California, Irvine, Orange

California Pacific Medical Center - Sutter Health, San Francisco

Centro Peninsular De Investigacion Clinica, Mérida

Oregon Health and Science University, Portland

University of Washington Medical Center, Seattle

Peking University First Hospital, Beijing

Peking University Third Hospital, Beijing

Peking Union Medical College Hospital, Beijing

China Medical University (CMU) - First Affiliated Hospital, Shenyang

The First Hospital of Jilin University, Changchun

Huashan Hospital Affiliated to Fudan University, Shanghai

Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai

Shanghai Renji Hospital, Shanghai

Nanjing Drum Tower Hospital, Nanjing

Anhui Provincial Hospital, Hefei

The First Affiliated Hospital - School of Medicine - ZheJiang University, Hangzhou

The Second Affiliated Hospital Of Nanchang University, Nanchang

Xiangya Hospital Central South University, Changsha

The Second Xiangya Hospital of Central South University, Changsha

Huazhong University of Science and Technology - Tongji Medical College - Tongji Hospital, Wuhan

First Affiliated Hospital (Henan Medical University - First Affiliated Hospital)-Zhengzhou University, Zhengzhou

Hospital Universitario 12 de Octubre, Madrid

Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou

Nanfang Hospital, Southern Medical University, Guangzhou

Sichuan Provincial Peoples Hospital, Chengdu

Rambam Health Care Campus, Haifa

Stanford Medicine Outpatient Center - Stanford Dermatology Clinic-Stanford University School of Medicine, Redwood City

Amyotrophic Lateral Sclerosis (ALS) Treatment Center,University of California San Francisco (UCSF), San Francisco

Yale Cancer Center-Yale University School Of Medicine, New Haven

UF Health Rheumatology, Gainesville

Harvard Medical School - Brigham and Women's Hospital (BWH) - The Schuster Family Transplantation Research Center (TRC), Boston

University of North Carolina (UNC) School of Medicine, Chapel Hill

Vanderbilt University Medical Center (VUMC) - Vanderbilt Rheumatology Clinic, Nashville

University of Vermont Medical Center - Main Campus, Burlington

Framingham Centro Medico, La Plata

Dim Clinica Privada, Ramos Mejía

Centro Dermatologico Schejtman, San Miguel

Centro de Investigaciones Medicas Tucuman, San Miguel de Tucumán

Genge Partners, Montreal

Ottawa Hospital Research Institute-Civic Campus, Ottawa

Revmatologicky ustav, Prague

American Hospital Network, Tbilisi

LTD New Hospitals, Tbilisi

Aversi Clinic, Tbilisi

LLC MediClub Georgia, Tbilisi

The First Medical Center, Tbilisi

LTD Tbilisi Heart Center, Tbilisi

National and Kapodistrian University of Athens - School of Health Sciences - Faculty of Medicine, Athens

National and Kapodistrian University of Athens - Eginition Hospital, Athens

Athens Medical Center, Athens

St. Vincents University Hospital, Dublin

Connolly Hospital Blanchardstown, Dublin

North West Rheumatology Unit - Our Lady's Hospital, Manorhamilton

Fondazione Policlinico Universitario Agostino Gemelli IRCCS - Universita Cattolica del Sacro Cuore, Roma

Azienda Ospedaliero Universitaria Sant'Andrea, Roma

Tokyo Medical And Dental University Hospital, Faculty of Medicine, Bunkyō City

Nippon Medical School - Nippon Medical School Hospital, Bunkyō City

St. Marianna University School of Medicine Hospital, Kawasaki

Kurume University Hospital, Kurume

Chiba-Nishi General Hospital, Matsudo-shi

Japan Community Healthcare Organization Chukyo Hospital, Nagoya

Kitasato University Hospital (KUH), Sagamihara-shi

Sapporo City Hospital, Sapporo

Hokkaido University Hospital - Rheumatology, Sapporo

Sasebo Chuo Hospital, Sasebo-shi

Tohoku University Hospital, Sendai

Tokushima University Hospital, Tokushima

Juntendo University Hospital - Rheumatology, Tokyo

The University of Tokyo Hospital, Tokyo

Keio University Hospital, Tokyo

University of Tsukuba Hospital - Rheumatology, Tsukuba

Yamaguchi University Hospital, Ube-shi

Wakayama Medical University Hospital - Dermatology, Wakayama

Vilnius University Hospital Santaros Klinikos, Vilnius

CITER - Centro de Investigacion y Tratamiento de las Enfermedades Reumaticas S.A. de C.V., Mexico City

Amsterdam University Medical Center (Amsterdam UMC), Academic Medical Center (AMC), Amsterdam

Universitair Medisch Centrum Utrecht (UMC Utrecht), Utrecht

Szpital Uniwersytecki nr 2 im. Dr Jana Biziela w Bydgoszczy, Bydgoszcz

USK-WAM Centralny Szpital Weteranow - Szpital Kniniczny ul. Zeromskiego 113, Lodz

Centrum Wsparcia Badan Klinicznych Pomorski Uniwersytet Medyczny w Szczecinie, Szczecin

Centro Hospitalar Lisboa Norte, E.P.E- Hospital Santa Maria, Lisbon

Centro Hospitalar Universitario de Santo Antonio, Porto

Kyung Hee University Medical Center, Seoul

Seoul National University Hospital, Seoul

Hanyang University Seoul Hospital, Seoul

Hospital General Universitario de Alicante, Alicante

Hospital Clinic de Barcelona - Sede Villarroel - Rheumatology, Barcelona

Hospital de la Santa Creu i Sant Pau, Barcelona

Hospital De Valme, Seville

Ankara University Medical Faculty, Ankara

Ankara City Hospital, Ankara

Royal National Hospital for Rheumatic Diseases - Royal United Hospitals Bath NHS Foundation Trust, Bath

Doncaster Royal Infirmary - Doncaster And Bassetlaw Hospitals Nhs Foundation Trust, Doncaster

Leeds Institute of Rheumatic & Musculoskeletal Medicine - University of Leeds, Leeds

Aintree University Hospital - Liverpool University Hospitals NHS Foundation Trust, Liverpool

The Royal Free Hospital - Royal Free London NHS Foundation Trust, London

Kings College Hospital NHS Foundation Trust, London

The National Hospital for Neurology and Neurosurgery, London

James Cook University Hospital - South Tees Hospitals NHS Foundation Trust, Middlesbrough

Salford Royal Hospital, Northern Care Alliance NHS Foundation Trust, Salford