BibTex format
@article{Pfeffer:2019:10.1164/rccm.201712-2506OC,
author = {Pfeffer, PE and Donaldson, GC and Mackay, AJ and Wedzicha, JA},
doi = {10.1164/rccm.201712-2506OC},
journal = {American Journal of Respiratory and Critical Care Medicine},
title = {Increased COPD exacerbations of likely viral etiology follow elevated ambient nitrogen oxides},
url = {http://dx.doi.org/10.1164/rccm.201712-2506OC},
volume = {199},
year = {2019}
}