Daewa, Rujaporn, Pattharapong Saneha, Laksika Bhuthathorn, and Natnicha Thetasen. 2021. “Spontaneous Regression of the Lung Bulla”. The ASEAN Journal of Radiology 22 (3). Bangkok, Thailand:41-46. https://asean-journal-radiology.org/index.php/ajr/article/view/154.