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st: combine 2 variables

From   Dao Kim <>
To   "" <>
Subject   st: combine 2 variables
Date   Tue, 11 Feb 2014 18:59:49 +0000

Dear Statalists, I try to combine two diagnoses variables to one, for patients that mostly only have 1 diagnosis for seizures etiology, but a minority has 2 etiologies/diagnoses, I can't figure out how to make only one variable. Concat doesn't work, I tried to merge 1:1 id , any idea? Thanks for your help!

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