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| IssueDate | 2018-01-01 | http://www.xbrl.org/2003/role/exampleRef |
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| URIDate | 2018-03-16 | http://www.xbrl.org/2003/role/exampleRef |
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| IssueDate | 2018-01-01 | http://www.xbrl.org/2003/role/disclosureRef |
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| URIDate | 2018-03-16 | http://www.xbrl.org/2003/role/disclosureRef |