BMJ. 1999 Apr 10;318(7189):1015A. doi: 10.1136/bmj.318.7189.1015a.
BMJ (Clinical research ed.)
Harrington
PMID: 10195991 PMCID: PMC1115396 DOI: 10.1136/bmj.318.7189.1015a Free PMC Article
[No abstract available.]