![](https://secure.gravatar.com/avatar/f174b9816ccce31bf5cdb49501b15358.jpg?s=120&d=mm&r=g)
17 Jul '09
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![](https://secure.gravatar.com/avatar/f174b9816ccce31bf5cdb49501b15358.jpg?s=120&d=mm&r=g)
creating an identifiant from various variables + double data entry
by epidata-list@lists.umanitoba.ca 10 Jul '09
by epidata-list@lists.umanitoba.ca 10 Jul '09
10 Jul '09
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