1. College of Biological Science and Engineering, Fuzhou University, Fuzhou, China
2. Japan National Institute of Occupational Safety and Health, Kawasaki, Japan
3. National Institute of Occupational Health and Poison Control, China CDC, Beijing, China
4. Food and Drug Administration of Beijing Fengtai District, Beijing, China
5. Beijing Guoji-Zhongyi Hospital, Beijing, China
6. Present address: Department of Sport and Medical Science, Faculty of Medical Technology, Teikyo University, Tokyo, Japan