Eun-Tae Jeon, Dong Hyun Kim, Heemoon Park, Jung-Kyu Lee, Eun Young Heo, Chang Hoon Lee, Deog Kyeom Kim, Hyun Woo Lee. "Prolonged expiratory time constant and risk of moderate-to-severe exacerbations in stable COPD." Scientific Reports (2026). https://doi.org/10.1038/s41598-026-39987-2