BibTex format
@article{Cowling:2016:10.1136/bmjqs-2016-005233,
author = {Cowling, T and Harris, M and Majeed, F},
doi = {10.1136/bmjqs-2016-005233},
journal = {BMJ Quality & Safety},
pages = {360--371},
title = {Extended opening hours and patient experience of general practice in England: multilevel regression analysis of a national patient survey},
url = {http://dx.doi.org/10.1136/bmjqs-2016-005233},
volume = {26},
year = {2016}
}