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Softening up on the hardening hypothesis
- Correspondence to Dr Joanna E Cohen, Director, Institute for Global Tobacco Control, Bloomberg Associate Professor of Disease Prevention, Johns Hopkins Bloomberg School of Public Health, 624 N Broadway, Hampton House 297, Baltimore, MD 21205-1996, USA; jocohen{at}jhsph.edu
Citation
Softening up on the hardening hypothesis
Publication history
- First published February 16, 2012.
Online issue publication
February 16, 2012
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© 2012, 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.