- Correspondence to Dr Gary A Giovino, Department of Community Health and Health Behavior, School of Public Health and Health Professions, University at Buffalo, The State University of New York, 311 Kimball Tower, 3435 Main Street, Buffalo, New York 14214-8028, USA;
- Received May 24, 2013
- Accepted August 8, 2013
- First published August 30, 2013.
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