1. Center for Occupational and Environmental Health; University of California; Irvine California
2. Division of Applied Research and Technology; National Institute of Occupational Safety and Health; Cincinnati Ohio
3. Department of Neurology; University of California; Irvine California
4. Department of Epidemiology; School of Public Health; University of California; Los Angeles California
5. School of Health Sciences; University of Occupational and Environmental Health; Kitakyushu Japan