%0 Journal Article %B American Journal of Epidemiology %D 2012 %G eng %M 22396389 %P 816-26 %T Impact of age at smoking initiation, dosage, and time since quitting on cardiovascular disease in african americans and whites: the atherosclerosis risk in communities study %V 175 %7 2012/03/08 %@ 1476-6256 (Electronic)0002-9262 (Linking)