Ferguson, G. ., Beck, B. ., Clerisme-Beaty, E. ., Liu, D. ., Thomashow, B. ., Wise, R. ., … Make, B. . (2017). Recruiting Patients After Hospital Discharge for Acute Exacerbation of COPD: Challenges and Lessons Learned. Chronic Obstructive Pulmonary Diseases (Miami, Fla.), 4(4), 265-278. https://doi.org/10.15326/jcopdf.4.4.2016.0176 (Original work published 2017)