Carter-Pokras Olivia, Bethune Lisa
Department of Epidemiology and Biostatistics, University of Maryland College Park School of Public Health, College Park, MD 20742, USA.
Soc Sci Med. 2009 Oct;69(7):992-5; discussion 999-1001. doi: 10.1016/j.socscimed.2009.06.042. Epub 2009 Jul 22.