Article Information
vol. 291 no. 5506 1043-1047
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History:
- Received for publication December 21, 2000
- Accepted for publication January 9, 2001
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- Previous version (January 18, 2001 - 14:56).
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Author Information
- Loren W. Runnels,
- Lixia Yue,
- David E. Clapham*