RT Journal Article SR Electronic T1 Environment and health: 9. The science of risk assessment JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 503 OP 506 VO 164 IS 4 A1 John C. Bailer III A1 A. John Bailer YR 2001 UL http://www.cmaj.ca/content/164/4/503.abstract