Cite
MLA Citation
Keele E. Wurst et al.. “Disease Burden of Patients with Asthma/COPD Overlap in a US Claims Database: Impact of ICD-9 Coding-based Definitions.” COPD, vol. 14, 2017, pp. 200–209. http://access.bl.uk/ark:/81055/vdc_100044449276.0x000021