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Re: Re: st: RE: Patient age at first cancer exam in STATA
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"[email protected]" <[email protected]> 
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[email protected] 
Subject 
 
Re: Re: st: RE: Patient age at first cancer exam in STATA 
Date 
 
Sun, 12 Jan 2014 04:03:45 +0100 
Dear Joe,
I have tried both: bysort Patid: keep if _n==1 and collapse.
Unfortunately none of them did work. It only kept 377 unique Patid,
neither of them was a cancer patient.
KR
John
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