Mertz Kristen J, Koehler Steven A, Weiss Harold B, Williams Karl E
Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA.
Int J Inj Contr Saf Promot. 2011 Dec;18(4):331-5. doi: 10.1080/17457300.2011.575473. Epub 2011 May 23.