Can we Save the rectum by watchful waiting or transanal microsurgery following shorT-course radiotherapy and Additional local oR systemic Treatment for early-stage REctal Cancer? STARTREC-3 protocol for a non-randomised, multicentre, phase II platform study. - de Vries SEN; Couwenberg AM; Marijnen CAM; Beets GL; Burger JW; Chalabi M; de Groot JW; Intven M; Peulen HM; Roodhart JML; de Wilt JHW; Grotenhuis BA (BMJ open, 2025)