RCT | Extended duration thromboprophylaxis (continued for 56 days postoperatively) is not beneficial after surgical resection of colorectal cancer. 14 Sep, 2022 | 13:22h | UTC Efficacy and safety of extended duration to perioperative thromboprophylaxis with low molecular weight heparin on disease-free survival after surgical resection of colorectal cancer (PERIOP-01): multicentre, open label, randomised controlled trial – The BMJ