1. Department of Epidemiology and Environmental Health, Juntendo University Faculty of Medicine, Tokyo, Japan
2. Graduate School of Environment and Information Sciences, Yokohama National University, Yokohama, Japan
3. National Institute of Occupational Safety and Health, Tama-ku, Kawasaki, Japan
4. Laboratory of Molecular Chemistry, Faculty of Pharmacy, Osaka Ohtani University, Osaka Pref, Japan
5. Department of Occupational and Environmental Health, Shanxi Medical University, Taiyuan, China
6. Center for Disease Control and Prevention, Taiyuan Steel and Iron Limited Co, Taiyuan, China
7. General Hospital, Taiyuan Steel and Iron Limited Co, Taiyuan, China
8. College of Biological Science and Engineering, Fuzhou University, Fuzhou, China