Kulthanan, K., S. Jiamton, and R. Kittisarapong. “Dermatology Life Quality Index in Thai Patients with Acne”. Siriraj Medical Journal, vol. 58, no. 12, Jan. 2007, pp. 3-7, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246021.