BibTex format
@article{Aylin:2013:10.1136/bmj.f2424,
author = {Aylin, P and Alexandrescu, R and Jen, MH and Mayer, EK and Bottle, A},
doi = {10.1136/bmj.f2424},
journal = {BMJ-BRITISH MEDICAL JOURNAL},
title = {Day of week of procedure and 30 day mortality for elective surgery: retrospective analysis of hospital episode statistics},
url = {http://dx.doi.org/10.1136/bmj.f2424},
volume = {346},
year = {2013}
}