Boonnuch, W., Chinswangwatanakul, V., Methasate, A., Akaraviputh, T., Lohsiriwat, V. and Lohsiriwat, D. 2006. Does Preoperative Chemoradiation Therapy in Locally Advanced Rectal Cancer Increase Rate of Sphincter Preserving Surgery? A Prospective Clinical Trial. Siriraj Medical Journal. 58, 4 (Apr. 2006), 743–746.