Expiratory Carbon Monoxide Levels of Cigarette Smokers in College Environment. Jurnal Respirologi Indonesia, [S. l.], v. 44, n. 4, 2024. DOI: 10.36497/jri.v44i4.642. Disponível em: http://www.jurnalrespirologi.org/index.php/jri/article/view/642. Acesso em: 9 jul. 2025.