W. . Boonnuch, V. . Chinswangwatanakul, A. . Methasate, T. . Akaraviputh, V. . Lohsiriwat, and D. Lohsiriwat, “Does Preoperative Chemoradiation Therapy in Locally Advanced Rectal Cancer Increase Rate of Sphincter Preserving Surgery? A Prospective Clinical Trial”, Siriraj Med J, vol. 58, no. 4, pp. 743–746, Apr. 2006.