Association of toluene exposure with risk of multiple myeloma (cumulative intensity of high-probability exposure, highest quartile vs unexposed). ENGELA, L’Etude des Facteurs Environmentaux et Genetique des Lymphomes de l’Adulte; FHCRC-SEER, Fred Hutchinson Cancer Research Center–Surveillance, Epidemiology, and End Results; FHCRC-1980s, Fred Hutchinson Cancer Research Center-1980s; LACCMM, Los Angeles County Case–Control Study of Multiple Myeloma.