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Softening up on the hardening hypothesis
  1. 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}
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Cohen JE, McDonald PW, Selby P
Softening up on the hardening hypothesis

Publication history

  • First published February 16, 2012.
Online issue publication 
May 13, 2016

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