Article Information
vol. 2003 no. 204 pl12
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American Association for the Advancement of Science
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- ↵*Corresponding authors. Telephone, 0049-7071-601-329; fax, 0049-7071-601-305; e-mail,bernhard.goetze{at}tuebingen.mpg.de; paolo.macchi{at}tuebingen.mpg.de