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Case control study of childhood cancers (leukemia, non-Hodgkin's lymphoma, and neuroblastoma) and exposure to physical (ELF-EMF, ionizing radiation), chemical (solvents, benzene, passive tobacco smoke, traffic pollution, insecticides, other related to parental occupation) and other factors (medical and personal history of child and parents, diet, crowding, infectious diseases, immunization). Data collection finished, analysis in progress, results to be published in 2005 |