1. Department of Community Medicine and Public Health, Faculty of Medicine, Menoufia University, Shebin El-Kom, Egypt
2. Department of Pharmacology and Toxicology and
3. Department of Social and Preventive Medicine, State University of New York at Buffalo, Buffalo, New York, USA
4. Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, Washington, USA
5. Center for Research on Occupational and Environmental Toxicology, Oregon Health and Science University, Portland, Oregon, USA
6. Department of Molecular Biosciences, University of California-Davis School of Veterinary Medicine, Davis, California, USA