Ruangyuttikarn, Werawan, Tawat Tositarat, Sanong Chaiyarasmee, and Panja Kulapongs. 2016. “ Shift to the Left Phenomenon of PHA Dose-Response Curve”. Journal of Associated Medical Sciences 8 (3):127. https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/60828.