Duangchan, C. , Toskulkao, T. , Danaidutsadeekul, S. and Iramaneerat , C. 2020. Effect of Gum Chewing on Bowel Motility in Patients with Colorectal Cancer after Open Colectomy: A Randomized Controlled Trial. Siriraj Medical Journal. 68, 3 (May 2020), 135–141.