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USD ($)
USD ($) / shares
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USD ($)
USD ($) / shares
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USD ($)
USD ($) / shares
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2/1/2010 - 1/31/2011
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2/1/2010 - 1/31/2011
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2/1/2010 - 1/31/2011
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2/1/2010 - 1/31/2011
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1/31/2011
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2/1/2010 - 1/31/2011
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