A Study Comparing the Efficacy and Safety of Zanidatamab to Trastuzumab, Each in Combination With Physician's Choice Chemotherapy, for the Treatment of Participants With Metastatic HER2-positive Breast Cancer

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Institute Jules Bordet, Anderlecht

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Medizinische Universitat Wien, Vienna

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The Kinghorn Cancer Centre, Mount Kuring-Gai

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UZ Antwerpen, Edegem

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Box Hill Hospital, Melbourne

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Peninsula and South Eastern Haematology and Oncology Group, Mount Waverly

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Ordensklinikum Barmherzige Schwestern, Linz

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Sunshine Coast University Private Hospital, Birtinya

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Klinikum Wels-Grieskirchen GmbH - Abteilung für Innere Medizin IV, Wels

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HPS Pharmacies - Adelaide, Adelaide

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CHU UCL Namur - Site Sainte-Elisabeth, Namur

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St John of God Hospital Subiaco, Subiaco

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Medizinische Universitat Innsbruck, Innsbruck

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Grand Hôpital de Charleroi, Gilly

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AZ Delta- Campus Rumbeke, Roeselare

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The Mount Sinai Hospital, New York

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Memorial Sloan Kettering, Long Island City

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Aretaieio Hospital, Athens

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AP HM Hopital de La Timone, Marseille

RECRUITING

Institut Paoli Calmettes, Marseille

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Helios Klinikum Berlin Buch GmbH Klinik für Gynäkologie und Geburtshilfe, Berlin

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Seoul National University Bundang Hospital, Seongnam-si

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Centre François Baclesse, Caen

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Hospital Universitario A Coruña, A Coruña

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Athens Medical Center, Athens

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Hospital Universitario Clinico San Cecilio, Granada

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Abramson Cancer Center of The University of Pennsylvania, Philadelphia

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Fox Chase Cancer Center, Philadelphia

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Medstar Georgetown University Hospital, Washington D.C.

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Washington Cancer Center, Washington D.C.

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IRCCS Istituto Clinico Humanitas, Rozzano

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Ospedale San Raffaele S.r.l PPDS, Milan

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Istituto Europeo di Oncologia, Milan

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Fondazione IRCCS San Gerardo dei Tintori, Monza

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Centre Georges François Leclerc, Dijon

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Gachon University Gil Medical Center, Namdong-gu

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Virginia Cancer Specialists, Fairfax

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Virginia Oncology Associates, Sentara Health, Norfolk

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Blue Ridge Cancer Care, Roanoke

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Asst Papa Giovanni Xxiii, Bergamo

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University General Hospital of Patras, Pátrai

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Fondazione IRCCS Policlinico San Matteo, Pavia

RECRUITING

Hospital Beata Maria Ana, Madrid

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MD Anderson Cancer Center, Madrid

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Hospital Clinico San Carlos, Madrid

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Hospital Universitario Fundacion Jimenez Diaz, Madrid

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Hospital Universitario 12 de Octubre, Madrid

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Messino Cancer Center, Asheville

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Oncopôle Claudius Regaud Pharmacie, Toulouse

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Mayo Clinic Jacksonville - PPDS, Jacksonville

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Institut Bergonie, Bordeaux

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IRCCS Centro di Riferimento Oncologico di Aviano CRO, Aviano

RECRUITING

Florida Cancer Specialists Research East, West Palm Beach

RECRUITING

Florida Cancer Specialists Research North, St. Petersburg

RECRUITING

Florida Cancer Specialists Research South, Fort Myers

RECRUITING

Pharmacie ICM Val d'Aurelle, Montpellier

RECRUITING

Istituto Oncologico Veneto - I.R.C.C.S., Padua

RECRUITING

CHUVI - H.U. Alvaro Cunqueiro, Vigo

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Sarah Cannon Research Institute, Nashville

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Hospital Universitario de Canarias, San Cristóbal de La Laguna

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Azienda Ospedaliero Universitaria Di Bologna Policlinico S Orsola Malpighi Via Massarenti, Bologna

RECRUITING

Hospital Universitario Virgen del Rocio, Seville

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Azienda Ospedaliero Universitaria di Modena, Modena

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Marienhospital Bottrop gGmbH, Dortmund

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Oncology Hematology Care (OHC), Cincinnati

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Hospital Clínico Universitario de Valencia, Valencia

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Froedtert and The Medical College of Wisconsin, Milwaukee

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Minnesota Oncology Hematology, Coon Rapids

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Mayo Clinic - PPDS, Rochester

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European Interbalkan Medical Center, Thessaloniki

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Centre Oscar Lambret, Lille

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Saint Luke's Cancer Institute, Kansas City

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ICANS - Institut de cancérologie Strasbourg Europe, Strasbourg

RECRUITING

Pharmacie Centre de Cancerologie de la Sarthe, Le Mans

RECRUITING

Maryland Oncology Hematology Healing Way - USOR, Irving

RECRUITING

Medical Oncology Hematology Consultants, Irving

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Nexus Health, Irving

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Sansum Clinic 540 W - USOR, Irving

RECRUITING

Texas Oncology Gulf Coast, Irving

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Texas Oncology West, Irving

RECRUITING

Texas Oncology - Fort Worth, Fort Worth

RECRUITING

U.T. MD Anderson Cancer Center, Investigational Pharmacy Services, Houston

WITHDRAWN

Millennium Research and Clinical Development, Houston

RECRUITING

Rocky Mountain Cancer Centers, Denver

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LMU Klinikum - Apotheke, München

RECRUITING

Mayo Clinic Scottsdale - PPDS, Phoenix

WITHDRAWN

Arizona Oncology Tucson - Wilmot, Tucson

RECRUITING

University of Arizona Cancer Center, Tucson

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Universitätsklinikum Ulm, Ulm

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USC-Norris Comprehensive Cancer Center - Investigational Drug Service IDS, Los Angeles

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The Oncology Institute Of Hope And Innovation, Cerritos

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Los Angeles Hematology Oncology Medical Group Glendale, Glendale

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UCSF at Mission Bay MB, San Francisco

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Gustave Roussy, Villejuif

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Fred Hutchinson Cancer Center, Seattle

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Soon Chun Hyang University Cheonan Hospital, Cheonan-si

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University of Colorado-Cancer Center-PPDS, Aurora

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Dana Farber Cancer Institute, Boston

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Hackensack Meridian Health, Hackensack

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Rutgers Cancer Institute of New Jersey, New Brunswick

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Perlmutter Cancer Center 160 E 34th St, New York

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Columbia University Medical Center 161 Fort Washington, New York

WITHDRAWN

University Hospitals Cleveland Medical Center 11100 Euclid Ave, Cleveland

RECRUITING

Rhode Island Hospital, Providence

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Hospital Nossa Senhora Da Conceição, Porto Alegre

RECRUITING

IEPE Unimed Sorocaba, Sorocaba

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DASA Hospital Brasilia, Brasília

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Centro Regional Integrado de Oncologia, Ceará

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Catarina Pesquisa Clinica, Itajaí

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Irmandade Da Santa Casa de Misericordia de Porto Alegre, Portalegre

RECRUITING

Hospital Sao Lucas Da Pontificia Universidade Catolica Do Rio Grande Do Sul PUCRS, Porto Alegre

RECRUITING

Real Hospital Portugues de Beneficiencia Em Pernambuco, Recife

RECRUITING

Nucleo de Oncologia Da Bahia, Salvador

RECRUITING

Ceon Pesquisas Ltda, São Caetano do Sul

RECRUITING

Hospital Beneficiencia Portuguesa, São Paulo

RECRUITING

Onco Star Sp Oncologia LTDA, São Paulo

RECRUITING

Jewish General Hospital, Montreal

RECRUITING

The Ottawa Hospital Cancer Centre, Ottawa

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CHU de Québec Université Laval Hôpital du Saint Sacrement, Québec

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Sunnybrook Research Institute, Toronto

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BC Cancer-Vancouver Center, Vancouver

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Universitätsklinikum Carl Gustav Carus an der TU, Dresden

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Chiba Cancer Center, Chiba

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National Cancer Center Hospital, Chūōku

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Osaka International Cancer Institute, Chūōku

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National Hospital Organization Kyushu Cancer Center, Fukuoka

RECRUITING

Fukushima Medical University Hospital, Fukushima

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Saitama Medical University International Medical Center, Hidaka-shi

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Tokai University Hospital, Isesaki-shi

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Sagara Hospital, Kagoshima

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Kyoto University Hospital, Kyoto

RECRUITING

Aichi Cancer Center, Nagoya

RECRUITING

Nagoya City University Hospital, Nagoya

RECRUITING

Okayama University Hospital, Okayama

RECRUITING

National Hospital Organization Osaka National Hospital, Osaka

RECRUITING

National Hospital Organization Hokkaido Cancer Center, Sapporo

RECRUITING

Juntendo University Hospital, Tokyo

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Showa University Hospital, Tokyo

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Kanagawa Cancer Center, Yokohama

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Białostockie Centrum Onkologii im. Marii Skłodowskiej-Curie w Białymstoku, Bialystok

RECRUITING

Wojewódzki Szpital Specjalistyczny W Białej Podlaskiej, Biała Podlaska

RECRUITING

Pratia MCM Kraków, Krakow

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Pratia Poznan, Poznan

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Uniwersytecki Szpital Kliniczny w Poznaniu, Poznan

RECRUITING

Narodowy Instytut Onkologii im. Marii Sklodowskiej-Curie Panstwowy Instytut Badawczy w Warszawie, Warsaw

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Seoul National University Hospital, Seoul

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Severance Hospital Yonsei University Health System, Seoul

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Gangnam Severance Hospital, Yonsei University Health System, Seoul

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Samsung Medical Center, Seoul

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The Catholic University of Korea, Seoul St. Mary's Hospital, Seoul

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Hospital Universitario de Badajoz, Badajoz

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Hospital Universitari Vall d Hebron, Barcelona

RECRUITING

Hospital Clinic de Barcelona, Barcelona

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ICO Badalona-H.U. Germans Trias i Pujol, Barcelona

RECRUITING

Hospital General Universitario de Elche, Elche

RECRUITING

Royal United Hospital, Bath

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Beatson West Of Scotland Cancer Centre, Glasgow

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Leicester Royal Infirmary, Leicester

RECRUITING

Guy's Hospital, London

RECRUITING

Charring Cross Hospital, London

RECRUITING

The Christie - PPDS, Manchester

RECRUITING

Churchill Hospital, Oxford

RECRUITING

New Cross Hospital, Wolverhampton