A Study to Investigate Tislelizumab Administered as Subcutaneous Injection Versus Intravenous Infusion Plus Chemotherapy in Patients With Unresectable or Metastatic Gastric or Gastroesophageal Junction Adenocarcinoma

Ironwood Cancer and Research Centers Chandler Ii, Chandler, Arizona, United States

Cancer and Blood Specialty Clinic, Los Alamitos, California, United States

UC Health Cancer Care and Hematology Clinic Memorial Hospital Central, Colorado Springs, Colorado, United States

Bioresearch Partners Holding Hialeah Hospital, Hialeah, Florida, United States

Orlando Health Cancer Institute Downtown Orlando, Orlando, Florida, United States

Northwestern University, Chicago, Illinois, United States

Hope and Healing Cancer Services, Hinsdale, Illinois, United States

University of Kansas Medical Center Research Institute, Kansas City, Kansas, United States

New England Cancer Specialists, Westbrook, Maine, United States

St Louis Cancer Care, Llp, Bridgeton, Missouri, United States

Nebraska Hematology Oncology, Lincoln, Nebraska, United States

Comprehensive Cancer Centers of Nevada, Las Vegas, Nevada, United States

Hunterdon Hematology Oncology, Flemington, New Jersey, United States

Summit Medical Group, Florham Park, New Jersey, United States

Oregon Oncology Specialists, Salem, Oregon, United States

Vanderbilt University, Nashville, Tennessee, United States

Md Anderson Cancer Center, Houston, Texas, United States

Scott and White Memorial Hospital, Temple, Texas, United States

Northwest Medical Specialties, Tacoma, Washington, United States

Hospital Aleman, CABA, Argentina

Instituto Alexander Fleming (Iaf), Ciudad Autonoma Buenos Aires, Argentina

Fundacion Cori Para La Investigacion Y Prevencion Del Cancer, La Rioja, Argentina

Krankenhaus Der Barmherzigen Schwestern Linz, Linz, Austria

Medical Univeristy Vienna, Vienna, Austria

Hospital de Amor Barretos, Barretos, Brazil

CECAP, Blumenau, Brazil

Hospital Brasilia, Brasília, Brazil

Hospital Universiario Onofre Lopes, Natal, Brazil

Hospital Sao Lucas Da Pucrs, Porto Alegre, Brazil

IMIP, Recife, Brazil

Inca Instituto Nacional de Cancer, Rio de Janeiro, Brazil

Fundacao Faculdade Regional de Medicina de Sao Jose Do Rio Preto, São José do Rio Preto, Brazil

Icesp Instituto Do Cancer Do Estado de Sao Paulo Octavio Frias de Oliveira, São Paulo, Brazil

Instituto Dor de Pesquisa E Ensino Sao Paulo, São Paulo, Brazil

Hospital Santa Rita de Cassia Afecc, Vitória, Brazil

The Second Hospital of Anhui Medical University, Hefei, Anhui, China

Cancer Hospital Chinese Academy of Medical Sciences, Beijing, Beijing Municipality, China

The First Affiliated Hospital of Xiamen University, Xiamen, Fujian, China

Anyang Tumor Hospital, Anyang, Henan, China

Henan Cancer Hospital, Zhengzhou, Henan, China

The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China

Nanjing Drum Tower Hospital,the Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China

Ganzhou Peoples Hospital Ganzhou Hospital Affiliated to Nanchang University, Ganzhou, Jiangxi, China

The First Hospital of China Medical University, Shenyang, Liaoning, China

Shandong Cancer Hospital, Jinan, Shandong, China

Affiliated Hospital of Jining Medical University, Jining, Shandong, China

Changzhi Peoples Hospital, Changzhi, Shanxi, China

Shanxi Provincial Cancer Hospital, Taiyuan, Shanxi, China

Tianjin Medical University Cancer Institute and Hospital, Tianjin, Tianjin Municipality, China

The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China

Masarykuv Onkologicky Ustav, Brno, Czechia

Fakultni Nemocnice Hradec Kralove, Hradec Králové, Czechia

Fakultni Nemocnice Olomouc, Olomouc, Czechia

Vseobecna Fakultni Nemocnice V Praze, Prague, Czechia

Institut Sainte Catherine, Avignon, France

Chru de Brest Hopital Cavale Blanche, Brest, France

Hopital Claude Huriez Chu Lille, Lille, France

Irccs Azienda Ospedaliera Metropolitana (Aom), Genova, Italy

Fondazione Irccs Istituto Nazionale Dei Tumori, Milan, Italy

Aou Pisana, Stabilimento Di Santa Chiara, Pisa, Italy

Istituto Clinico Humanitas, Rozzano, Italy

Matsuyama Red Cross Hospital, Matsuyama, Ehime, Japan

Japan Community Health Care Organization Kyushu Hospital, Kitakyushu, Fukuoka, Japan

Nho Hokkaido Cancer Center, Sapporo, Hokkaido, Japan

Osaka Rosai Hospital, SakaiShi, Osaka, Japan

Osaka Medical and Pharmaceutical University Hospital, Takatsukishi, Osaka, Japan

Saitama Cancer Center, Kitaadachigun, Saitama, Japan

Hamamatsu University School of Medicine, University Hospital, Hamamatsushi, Shizuoka, Japan

Tochigi Cancer Center, Utsunomiya, Tochigi, Japan

Institute of Science Tokyo Hospital, Bunkyoku, Tokyo, Japan

Tokyo Metropolitan Bokutoh Hospital, SumidaKu, Tokyo, Japan

Health Pharma Professional Research Sa de Cv, Mexico City, Mexico

Medical Care and Research Sa de Cv, Mérida, Mexico

Centro de Investigacion Clinica de Oaxaca, Oaxaca City, Mexico

Pratia McM Krakow, Krakow, Poland

Narodowy Instytut Onkologii Im Marii Sklodowskiej Curie Hematology Unit, Warsaw, Poland

Pan American Oncology Trials, Llc, Rio Piedras, Puerto Rico

Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do, South Korea

Kyungpook National University Chilgok Hospital, BukGu, Gyeongsangbukdo, South Korea

Samsung Medical Center, GangnamGu, Seoul Teugbyeolsi, South Korea

Severance Hospital Yonsei University Health System, SeodaemunGu, Seoul Teugbyeolsi, South Korea

Seoul National University Hospital, Seoul, Seoul Teugbyeolsi, South Korea

Asan Medical Center, SongpaGu, Seoul Teugbyeolsi, South Korea

Hospital Clinic de Barcelona, Barcelona, Spain

Hospital Universitario de Navarra, Pamplona, Spain

Hospital Clinico Universitario de Valencia, Valencia, Spain

Hospital Universitario Miguel Servet, Zaragoza, Spain

Medical Park Seyhan Hospital, Adana, Turkey (Türkiye)

Dr Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital, Ankara, Turkey (Türkiye)

Acibadem Adana Hospital, Kuruköprü, Turkey (Türkiye)

Medical Park Florya Hospital, Sefaköy, Turkey (Türkiye)

Cambridge University Hospitals Nhs Foundation Trust, Cambridge, United Kingdom

Ninewells Hospital and Medical School, Dundee, United Kingdom

Clatterbridge Cancer Centre, Metropolitan Borough of Wirral, United Kingdom