Letters Response See allHide authors and affiliations Science 13 Mar 1992:Vol. 255, Issue 5050, pp. 1335DOI: 10.1126/science.255.5050.1335-a ELIZABETH CULOTTAFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.
Science Vol 255, Issue 505013 March 1992 Table of Contents Print Table of Contents Back Matter (PDF) Ed Board (PDF) Front Matter (PDF)
