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Source: American Journal of Health Behavior, Volume 30, Number 5, September 2006, pp. 544-554(11)
Publisher: PNG Publications
Document Type: Research Article
Affiliations: 1: Senior Research Investigator, University of Pennsylvania, Philadelphia, PA. 2: Professor of Medicine, University of Pennsylvania, Philadelphia, PA. 3: Research Coordinator, University of Pennsylvania, Philadelphia, PA.
Publication date: September 1, 2006