Topothai, Kansiri, Nyampak Tayana, Saisuree Prateeptongkum, Nongnaphat Duangdee, and Esthera Prateeptongkum. 2022. “Cyclooxygenase-2- Inhibiting Activity of Polyphenols in Extracts of Tea from Various Geographic Locations in Thailand”. Journal of The Department of Medical Services 47 (1):119-28. https://he02.tci-thaijo.org/index.php/JDMS/article/view/253517.