Zhang, XinXin, LiJian Pang, XiaoDong Lv, and HaoYang Zhang. “Risk Factors for Bronchiectasis in Patients With Chronic Obstructive Pulmonary Disease: A Systematic Review and Meta-Analysis”. Clinics 76 (November 9, 2021): e2420. Accessed July 22, 2024. https://revistas.usp.br/clinics/article/view/191924.