[1] US EPA, Ctr Publ Hlth & Environm Assessment, Off Res & Dev, 109 TW Alexander Dr M-D B243-01, Res Triangle Pk, NC 27709 USA
[2] Ctr Dis Control & Prevent, Div Canc Prevent & Control, Atlanta, GA USA
[3] US EPA, Off Atmospher Programs, Off Air & Radiat, Washington, DC 20460 USA
[4] Univ Calif Berkeley, Sch Publ Hlth, Div Epidemiol & Biostat, Berkeley, CA 94720 USA
[5] Southern Calif Coastal Water Res Project Author, Costa Mesa, CA USA