BibTex format
@article{Leng:2014:10.1136/bmjopen-2014-006071,
author = {Leng, Y and Ahmadi-Abhari, S and Wainwright, NWJ and Cappuccio, FP and Surtees, PG and Luben, R and Brayne, C and Khaw, K-T},
doi = {10.1136/bmjopen-2014-006071},
journal = {BMJ OPEN},
title = {Daytime napping, sleep duration and serum C reactive protein: a population-based cohort study},
url = {http://dx.doi.org/10.1136/bmjopen-2014-006071},
volume = {4},
year = {2014}
}