BibTex format
@article{Stone:2020:10.1136/bmjopen-2019-032467,
author = {Stone, P and Sood, N and Feary, J and Roberts, CM and Quint, J},
doi = {10.1136/bmjopen-2019-032467},
journal = {BMJ Open},
title = {Validation of acute exacerbation of chronic obstructive pulmonary disease (COPD) recording in electronic health records: a systematic review protocol},
url = {http://dx.doi.org/10.1136/bmjopen-2019-032467},
volume = {10},
year = {2020}
}