Journal List Arch Dis Child v.64(4 Spec No); 1989 Apr PMC1592039 As a library, NLM provides access to scientific literature. Inclusion in an NLM database does not imply endorsement of, or agreement with, the contents by NLM or the National Institutes of Health. Learn more about our disclaimer. Author information Copyright and License information Disclaimer Get a printable copy (PDF file) of the complete article (727K). Links to PubMed are also available for Selected References.
