Drupal-Bibcite0<style face="normal" font="default" size="100%">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</style><style face="normal" font="default" size="100%">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</style>