JOINT FILING AGREEMENT
EXHIBIT 1
The undersigned hereby agree to the joint filing of the Amendment No. 5 to the Schedule 13G to which this Agreement is attached.
Dated: February 13, 2009
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DISCOVERY GROUP I, LLC, |
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for itself and as general partner of |
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DISCOVERY EQUITY PARTNERS, L.P. |
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By |
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Managing Member |
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▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇* |
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*By: |
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Attorney-in-Fact for ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇ |
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Attorney-in-Fact for ▇▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ |