Correction: Eight Americas: Investigating Mortality Disparities across Races, Counties, and Race-Counties in the United States

The term “Eight Americas,” an earlier revision of the description of the Eight Americas, and an earlier revision of life expectancies for 2001 were previously published in a commentary in the American Journal of Preventive Medicine [1]. This commentary cited the current paper as the technical source of this information, also declared at the time of submission of the current manuscript. This earlier publication should have been cited in the current article, under Introduction, after the sentence “...we have divided US race-counties into eight subgroups based on a number of sociodemographic and geographical variables, referred to as the ‘eight Americas’.”