Does Radiation Boost Dose Affect Organ Preservation Rates? A Secondary Analysis of the Organ Preservation in Patients With Rectal Adenocarcinoma Trial. - Yariv O; Williams H; Goodman KA; Verheij FS; Omer DM; Lin ST; Qin LX; Gollub MJ; Saltz LB; Garcia-Aguilar J; Wu AJ (International journal of radiation oncology, biology, physics, 2026)