D. Songsaeng, M. . Puengphong, K. . Muangsomboon, V. . Veerasarn, and A. . Suwanbundit, “Necessary for CT Whole Abdomen in Post Chemoradiation of Rectosigmoid Cancer Stage 3: A Comparative Study”, Siriraj Med J, vol. 58, no. 7, pp. 903–906, Jul. 2006.