1. From Institute of Toxicology, College of Preventive Medicine, The Third Military Medical University, Chongqing, PR China
2. Public Health Laboratory Sciences and Toxicology, West China School of Public Health, Sichuan University, Chengdu, China
3. Institute for Chemical Carcinogenesis, Guangzhou Medical University, Xinzao, Panyu District, Guangzhou, China
4. Department of Histology and Embryology, College of Basic Medicine, The Third Military Medical University, Chongqing, China