1. From the Department of Environmental Health, Instituto Nacional de Salud Pública, Cuernavaca, Mexico (I.G.-A., H.R.-R., S.J.R.)
2. Independent Consultant, Mexico City, Mexico (L.R.-B.)
3. Department of Geography and Environmental Development, Ben-Gurion University of the Negev, Beer Sheva, Israel (I.K.)
4. Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, NY (A.C.J.).