Articles
Personal view
British Medical Journal 1993; 307 doi: https://doi.org/10.1136/bmj.307.6905.689 (Published 11 September 1993) Cite this as: British Medical Journal 1993;307:689
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.