Widening of Socioeconomic Inequalities in U.S. Death Rates, 1993–2001 Jemal, Ahmedin ; Ward, Elizabeth ; Anderson, Robert N. ; Murray, Taylor ; Thun, Michael J. Abstract Publication: PLoS ONE Pub Date: May 2008 DOI: 10.1371/journal.pone.0002181 Bibcode: 2008PLoSO...3.2181J