BMJ. 1992 Apr 18;304(6833):1055. doi: 10.1136/bmj.304.6833.1055.
BMJ (Clinical research ed.)
P Kinnersley, P Owen
PMID: 1586800 PMCID: PMC1881742 DOI: 10.1136/bmj.304.6833.1055 Free PMC Article
[No abstract available.]