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Observational research methods. Research design II: cohort, cross sectional, and case-control studies
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  1. Correspondence to:
 Dr C J Mann; 
 tonygood{at}doctors.org.uk
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Mann CJ
Observational research methods. Research design II: cohort, cross sectional, and case-control studies

Publication history

  • First published January 1, 2003.
Online issue publication 
January 01, 2003

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