1. Laboratory of Mathematical Chemistry (LMC), As. Zlatarov University, Bourgas, Bulgaria
2. Division of Genetics and Mutagenesis, National Institute of Health Sciences, Tokyo, Japan
3. Biosafety Research Center, Foods, Drugs and Pesticides, Iwata, Japan
4. Environment and Health Department, Istituto Superiore di Sanita', Rome, Italy
5. DuPont Haskell Global Centers for Health and Environmental Sciences, Newark,
Delaware 19714-0050, United States