URLDate
Verified		Extra Software
Requirements
(if any)		Access
Conditions		Notes
http://dx.doi.org/10.1136/bjsm.2007.036665DOI Link
http://bjsm.bmj.com/content/41/suppl_1/i33.full05/12/2014
http://bjsm.bmj.com/content/41/suppl_1/i33.full.pd[...]05/12/2014PDF ReaderItem is within a limited-access website