BibTex format
@article{Gulea:2018:10.1136/bmjopen-2018-024736,
author = {Gulea, C and Zakeri, R and Quint, JK},
doi = {10.1136/bmjopen-2018-024736},
journal = {BMJ Open},
title = {Effect of beta-blocker therapy on clinical outcomes, safety, health-related quality of life and functional capacity in patients with chronic obstructive pulmonary disease (COPD): A protocol for a systematic literature review and meta-analysis with multiple treatment comparison},
url = {http://dx.doi.org/10.1136/bmjopen-2018-024736},
volume = {8},
year = {2018}
}