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Limited (search only) no.2 (2000)
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University of California
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Limited (search only) no.3 (2001)
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University of California
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Limited (search only) no.4 (2002)
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University of California
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Limited (search only) no.5 (2003)
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University of California
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Limited (search only) no.6 2004
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Indiana University
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Limited (search only) no.7 2005
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Indiana University
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Limited (search only) no.8 2006
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Indiana University
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Limited (search only) no.9 (2007)
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University of California
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Limited (search only) no.10 (2008)
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University of California
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Limited (search only) no.11 (2009)
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University of California
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Limited (search only) no.12 (2010)
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University of California
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Limited (search only) no.15 (2013)
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University of Illinois at Urbana-Champaign
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