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st: N visits per patient


From   "Ziad El-Khatib" <Ziad.El-Khatib@ki.se>
To   statalist@hsphsun2.harvard.edu
Subject   st: N visits per patient
Date   Sun, 28 Oct 2007 06:42:54 -0700

Hi again
in the same dataset each patient did come more than once, is it
possible to count n of visits per patient using patientID number for
example?

Thank you and best regards
ziad
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