Randomized Clinical Trial on Preoperative Radiotherapy 25 Gy in Rectal Cancer
Jagiellonian University
Jagiellonian University
Niguarda Hospital
Sun Yat-sen University
Hospital San Carlos, Madrid
Mansoura University
UNICANCER
Université de Sousse
Alliance for Clinical Trials in Oncology
Region Skane
Cardiff University
Memorial Sloan Kettering Cancer Center
Memorial Sloan Kettering Cancer Center
National Cancer Institute (NCI)
Grupo Espanol Multidisciplinario del Cancer Digestivo
National Cancer Institute (NCI)
Memorial Sloan Kettering Cancer Center
Roswell Park Cancer Institute
Fox Chase Cancer Center
National Cancer Institute (NCI)