News
In brief
BMJ 2011; 342 doi: https://doi.org/10.1136/bmj.d2284 (Published 11 April 2011) Cite this as: BMJ 2011;342:d2284
Article usage
Article metrics provide readers and authors with an indication of how often a specific article has been accessed month by month. It counts three formats - abstract/extract, full text and pdf. The page is updated each day.