Exhaled Carbon Monoxide (eCO) and Serum CC16 Levels in Active Smokers. Jurnal Respirologi Indonesia, [S. l.], v. 41, n. 3, p. 200–206, 2021. DOI: 10.36497/jri.v41i3.181. Disponível em: http://www.jurnalrespirologi.org/index.php/jri/article/view/181. Acesso em: 19 aug. 2025.