ACKNOWLEDGMENTS
The authors are deeply indebted to Prof. Arima of Fukuoka University for his contribution to the stratified assignment and for his important advice on the analysis. We thank the staff of Kinki Health Administration Center, Heiwado Health Insurance Society, and Heiwado Occupational Health Care Office for their excellent support in intervention implementation. We also thank Melissa Leffler, MBA, and Diane Williams, PhD, from Edanz (