Factors associated with tobacco use in patients with asthma during the confinement due to COVID-19 in an urban region with high numbers of SARS-CoV-2 infections. Rev Alerg Mex [Internet]. 2021 Dec. 3 [cited 2026 Sep. 23];68(4):218-24. Available from: https://ojs.revistaalergia.mx/ojs/index.php/ram/article/view/922