A Study of Rituximab-Gemcitabine-Dexamethasone-Platinum (R-GDP) With or Without Selinexor in Patients With Relapsed/Refractory Diffuse Large B-cell Lymphoma

Ironwood Physicians P.C. dba Ironwood Cancer and Research Centers, Chandler, Arizona, United States

Arizona Oncology Associates, Tucson, Arizona, United States

The Oncology Institute (TOI) Clinical Research, Cerritos, California, United States

Norton Cancer Institute, St. Matthews, Louisville, Kentucky, United States

University of Maryland Greenebaum Comprehensive Cancer Center, Baltimore, Maryland, United States

Stony Brook, Stony Brook, New York, United States

Texas Oncology - Tyler, Tyler, Texas, United States

The University of Texas Health Science Center at Tyler DBA UT Health East Texas HOPE Cancer Center, Tyler, Texas, United States

Jiangsu Province Hospital, Nanjing, Jiangsu, China

The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China

Ruijin Hospital Affiliated to The Shanghai Jiao Tong University Medical School, Huangpu, Shanghai Municipality, China

Zhongshan Hospital Fudan University, Xuhui, Shanghai Municipality, China

Huaxi Hospital Sichuan University, Chengdu, Sichuan, China

The first affiliated Hospital, Zhejiang University, Hangzhou, Zhejiang, China

Assuta Ashdod Medical Center, Ashdod, Israel

Soroka Medical Center, Beersheba, Israel

Rabin Medical Center, Petah Tikva, Israel

Assuta medical centers - Ramat Hachayal, Tel Aviv, Israel

AOU Ospedali Riuniti-Università Politecnica delle Marche Clinica di Ematologia, Ancona, Ancona, Italy

UOC Ematologia ad Indirizzo Oncologico, AORN "Sant'Anna e San Sebastiano", Caserta, Caserta, Italy

National Cancer Institute, Naples, Napoli, Italy

AOU Maggiore della Carità SCDU Ematologia, Novara, Novara, Italy

DIP. Oncologia- Ematologia, UOSD Centro Diagnosie TerapiaDei Linfomi, Pescara, Pescara, Italy

Fondatione Policlinico Universitario A. Gemelli, Rome, Rome, Italy

Azienda Ospedaliera Ospedali Riuniti Villa Sofia Cervello, Palermo, Sicily, Italy

AOU City of Health and Science of Turin, Turin, Torino, Italy

Pratia MCM Krakow, Krakow, Lesser, Poland

Szpitale pomorskie gdynia dept of haematology, Gdynia, Pomeranian Voivodeship, Poland

Klinika Hematologii, Nowotworów Krwi i Transplantacji Szpiku Uniwersytecki Szpital Kliniczny im. Jana Mikulicza - Radeckiego we Wrocławiu, Wroclaw, Radeckiego, Poland

Pratia Onkologia Katowice, Katowice, Silesian Voivodeship, Poland

CM Pratia Poznań, Skorzewo, Wielkopolska, Poland

Institute of Hematology and Transfusion Medicine, Warsaw, Poland

Department of Lymphoid Malignancies, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland

Institut català d'oncologia-hospital germans trias i pujol, Badalona, Barcelona, Spain

Hospital Vall Hebron, Barcelona, Barcelona, Spain

Institut Catala D'oncolocia, Barcelona, Barcelona, Spain

Hospital Universitario La Paz, Madrid, Madrid, Spain

Hospital Virgen del Rocío, Seville, Seville, Spain