BMJ. 1988 Dec 17;297(6663):1606. doi: 10.1136/bmj.297.6663.1606.
BMJ (Clinical research ed.)
M W Davies
PMID: 3147092 PMCID: PMC1835300 DOI: 10.1136/bmj.297.6663.1606 Free PMC Article
[No abstract available.]