Benjamin G Jacob, Nathan D Burkett-Cadena, Jeffrey C Luvall, Sarah H Parcak, Christopher JW McClure, Laura K Estep, Geoffrey E Hill, Eddie W Cupp, Robert J Novak, Thomas R Unnasch
Int J Health Geogr. 2010; 9: 12. Published online 2010 February 24. doi: 10.1186/1476-072X-9-12