Foster E Michael
University of North Carolina, Gillings School of Global Public Health, Box 7445, Chapel Hill, Chapel Hill, NC-27599-7445, United States.
Soc Sci Med. 2010 May;70(9):1271-3; discussion 1274-6. doi: 10.1016/j.socscimed.2009.12.032. Epub 2010 Feb 12.