Articles
Notes
British Medical Journal 1989; 298 doi: https://doi.org/10.1136/bmj.298.6688.1653 (Published 17 June 1989) Cite this as: British Medical Journal 1989;298:1653
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.