Editor's Choice
Using evidence on yourself
BMJ 2000; 320 doi: https://doi.org/10.1136/bmj.320.7228.0 (Published 15 January 2000) Cite this as: BMJ 2000;320:0
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.