Ishida, W., S. Malaivijitnond, and T. Ishida. “Changes in Serum Immunoglobulin Levels Among Cynomolgus Monkeys With Long Term Morphine Treatment”. Srinagarind Medical Journal, vol. 11, no. 2, Nov. 2013, pp. 57-64, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13875.