Author	D. Kella L. Vejby-Christensen P. Johnson H. Pedersen L. Andersen
Year of Publication	1997
Date Published	Jun-06-1997
Journal Title	Science
Volume	276
Start Page or Article ID	1530-1533
ISSN Number	00368075
DOI	10.1126/science.276.5318.1530
URL	http://www.sciencemag.org/cgi/doi/10.1126/science.276.5318.1530
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Publication Status	Published