BibTex format
@article{Ross:2008:10.1136/bmj.a2234,
author = {Ross, JR and Riley, J},
doi = {10.1136/bmj.a2234},
journal = {BRITISH MEDICAL JOURNAL},
title = {Commentary: Controversies in SIGN guidance on pain control in patients with cancer},
url = {http://dx.doi.org/10.1136/bmj.a2234},
volume = {337},
year = {2008}
}