1. Carcinogen‐DNA Interactions Section, Laboratory of Cancer Biology and GeneticsCCR, National Cancer Institute, NIH Bethesda Maryland
2. Division of Biochemical ToxicologyNational Center for Toxicological Research, USFDA Jefferson Arkansas
3. Methods and Technologies Branch, Epidemiology and Genomics Research Program, DCPCNational Cancer Institute, NIH Bethesda Maryland
4. Département de pathologie et microbiologie, Faculté de médecine vétérinaireUniversité de Montréal St. Hyacinthe Quebec Canada