Izquierdo, M., Marion, C. R., Genese, F., Newell, J. D., O’Neal, W. K., Li, X., Hawkins, G. A., Barjaktarevic, I., Barr, R. G., Christenson, S., Cooper, C. B., Couper, D., Curtis, J., Han, M. K., Hansel, N. N., Kanner, R. E., Martinez, F. J., Paine, III, R., Tejwani, V., … Ortega, V. E. (2023). Impact of Bronchiectasis on COPD Severity and Alpha-1 Antitrypsin Deficiency as a Risk Factor in Individuals with a Heavy Smoking History. Chronic Obstructive Pulmonary Diseases: Journal of the COPD Foundation, 199–210. https://doi.org/10.15326/jcopdf.2023.0388