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pubmed:abstractText |
Among cigarette smokers, lower levels of consumption, defined as smoking fewer cigarettes per day (CPD) or not smoking daily, are becoming more common. The relationship between cigarette consumption and smoking frequency (daily or nondaily) is not well characterized, and the natural history of light smoking (defined here as smoking < or =10 CPD) is poorly understood.
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pubmed:affiliation |
Tobacco Research and Treatment Center, MGH Institute for Health Policy, Massachusetts General Hospital, 50 Staniford Street, Boston, MA 02114, USA. douglas_levy2@hms.harvard.edu
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