Phongchamnaphai, Phana. 2018. “The Effectiveness of Acupuncture for Pain Relief in Knee Osteoarthritis Patients in Khaokho Hospital, Phetchabun Province”. Journal of Health Science of Thailand 17 (Supplement III):SIII623-632. https://www.thaidj.org/index.php/JHS/article/view/5102.