Postgrad Med J. 1993 Jun;69(812):469-71. doi: 10.1136/pgmj.69.812.469.
Postgraduate medical journal
B Ramsay
PMID: 8208645 PMCID: PMC2399857 DOI: 10.1136/pgmj.69.812.469 Free PMC Article
[No abstract available.]