Theerapongpakdee, Sunchai, and Prapasri Nilpiboon. 2013. “ Fro Versus Mapleson D Circuit – A Comparative Study of Capillary Blood Gas”. Srinagarind Medical Journal 1 (3):199-204. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13274.