Silverman Jay G, Pratt Carter, Reed Elizabeth, Nagy Beth J, Whitaker Daniel K, Baker Charlene, Decker Michele R, Koh Howard, Pavlos Carlene
Division od Public Health Practice, Harvard School of Public Health, Boston, MA, USA.
Public Health Rep. 2004 Nov-Dec;119(6):590-3. doi: 10.1016/j.phr.2004.09.010.