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st: N visits per patient

From	"Ziad El-Khatib" <[email protected]>
To	[email protected]
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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