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Letter
Cell phone use and behavioural problems: indications of unobserved heterogeneity in Divan et al's study
- Correspondence to Dr Jarle Aarstad, Faculty of Engineering, Bergen University College, PO Box 7030, Nygardsgaten 112, NO-5020 Bergen, Norway; jarle.aarstad{at}hib.no
Citation
Cell phone use and behavioural problems: indications of unobserved heterogeneity in Divan et al's study
Publication history
- Accepted December 20, 2010
- First published January 22, 2011.
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.