From the Division of Surveillance, Hazard Evaluations, and Field Studies (Ms Birdsey and Drs Sieber, Robinson, and Sweeney), and Division of Applied Research and Technology (Dr Hitchcock), National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Cincinnati, Ohio; and Division of Safety Research (Dr Chen and Ms Lincoln), National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, W Va.
Address correspondence to: Jan Birdsey, MPH, National Institute for Occupational Safety and Health, 4676 Columbia Pkwy, MS-R17, Cincinnati, OH 45226 ([email protected]).
Dr Nakata was formerly with the Division of Applied Research and Technology, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Cincinnati, Ohio, but is currently with the University of Occupational and Environmental Health, Fukuoka, Japan.
This work was funded by the National Institute for Occupational Safety and Health with partial support from the Federal Motor Carrier Safety Administration, Department of Transportation. This project was partially funded by the Federal Motor Carrier Safety Administration, and the balance of the funding came from NIOSH.
There are no conflicts of interest among any of the authors.
Disclaimer: The findings and conclusions in this report are those of the authors and do not necessarily represent the views of the National Institute for Occupational Safety and Health or the University of Occupational and Environmental Health, Fukuoka, Japan.
