@article{Singh2007,
author = {Singh, G.K. and Kogan, M.D.},
title= {Persistent socioeconomic disparities in infant, neonatal, and postneonatal mortality rates in the United States, 1969–2001},
year = {2007},
doi = {10.1542/peds.2005-2181},
volume = {119},
number = {4},
pages = {e928--e939},
}