Yimyaem, P. R., T. Tassakhon, W. Sriraj, M. Wongswadiwat, S. Pongjanyakul, R. Sankhot, A. Sinkueakunkit, and S. Thienthong. “Internship Doctors’ Knowledge and Attitudes Toward Pain Management in Cancer Patients at General Hospitals in Northeast Thailand”. Srinagarind Medical Journal, vol. 27, no. 3, Aug. 2013, pp. 279-87, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/11151.