Key points are not available for this paper at this time.
This article was first published in the British Medical Journal Volume 323 Issue 7321. BMJ allows authors to use their own articles for their own non commercial purposes. www.bmj.com Reproduced with permission from Dr. James E. Till
Eysenbach et al. (2001) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: