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<td align="right" valign="top">&nbsp;</td><td width="5">&nbsp;</td><td colspan="2" valign="top">American Association for the Advancement of Science<br>Return to citation in text: 
	 [<a href="#N10073" class="hiddenlink">1</a>]
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<td align="right" valign="top">10.</td><td width="5">&nbsp;</td><td colspan="2" valign="to