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PDFTheory and methods
Sample selection and validity of exposure–disease association estimates in cohort studies
- Correspondence to Costanza Pizzi, Via Santena 7, 10126 Torino, Italy; costanza.pizzi{at}lshtm.ac.uk
Citation
Sample selection and validity of exposure–disease association estimates in cohort studies
Publication history
- Accepted July 29, 2010
- First published September 29, 2010.
Online issue publication
April 27, 2016
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© 2011, Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.