Jiaranaikajorn, T., J. Panthawangkul, and V. Thamlikitkul. “Use of Alternative Medicines among Medical Patients at Siriraj Hospital”. Siriraj Medical Journal, vol. 54, no. 10, Oct. 2002, pp. 603-10, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/245316.