Li, T. and Xu, X. (2024) “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, 40(9). doi: 10.12669/pjms.40.9.10221.