Wirakusuma IBJ, Somia IKA, Arisanti NLPE, Rai IBN, Kusumawardani IAJD, Candrawati NW, Artana IGNB. Correlation between alveolar-arterial oxygen tension difference gradient baseline with spirometry test in severe coronavirus disease 2019 (COVID-19). Int. J. of Health Sci. [Internet]. 2022 Sep. 25 [cited 2026 Apr. 17];6(S9):2578-8. Available from: https://sciencescholar.us/journal/index.php/ijhs/article/view/12986