@article{Harper2007,
author = {Harper, S. and Lynch, J. and Burris, S. and Smith, G.D.},
title= {Trends in the black-white life expectancy gap in the United States, 1983–2003},
year = {2007},
doi = {10.1001/jama.297.11.1224},
volume = {297},
number = {11},
pages = {1224--1232},
}