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| 0001214782-13-000147.txt | 2013-03-21 08:09:45 | |
 0001214782-13-000147-xbrl.zip | 121719 | 2013-03-21 08:09:45 |
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| vertex10k123112.htm | 1722417 | 2013-03-21 08:09:45 |
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