abnormalities analysis biologicalassay carcinogenesis carcinogenicitytests carcinogens cesare chemicallyinduced chemicalmutagenesis congresses drug-induced drug-relatedsideeffectsandadversereactions drugs environmental environmentallyinduceddiseases etiology evaluationstudiesastopic humanscancerpathogens maltoni mutagens neoplasms organicchemicals pharmacology publichealth qh411s989i1976 qz200c26551992 qz202c264422002 qz202u5786e salmonella toxicity toxicology