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Journal of Health Economics > 2013 > 32 > 5 > 794-803
Preventive Medicine > 2012 > 55 > Supplement > S68-S74
The American Journal of Medicine > 2011 > 124 > 11 > 1082-1085
Journal of Nutrition Education and Behavior > 2003 > 35 > 2 > 98-104