Promsrisuk, Tichanon, Ratchaniporn Kongsui, Napatr Sriraksa, Arunrat Srithawong, Pacharee Manoy, and Phoramate Wongpurthichai. 2021. “Fractional Exhaled Nitric Oxide Is Correlated With Pulmonary Function in Patients With Stable Chronic Obstructive Pulmonary Disease”. Health Science, Science and Technology Reviews 14 (2):39-50. https://li01.tci-thaijo.org/index.php/journalup/article/view/247097.