LI, Ting; XU, Xuefen. Effect of high-flow nasal oxygen therapy combined with ipratropium bromide on Th1/Th2 balance and inflammation in patients with chronic obstructive pulmonary disease and respiratory failure: high-flow nasal oxygen therapy combined with ipratropium bromide on chronic obstructive pulmonary disease. Pakistan Journal of Medical Sciences, [S. l.], v. 40, n. 9, 2024. DOI: 10.12669/pjms.40.9.10221. Disponível em: https://www.pjms.org.pk/index.php/pjms/article/view/10221. Acesso em: 7 dec. 2025.