1. Department of Human Health Sciences, Graduate School of Medicine, Kyoto University , Kyoto 6068507 , Japan
2. Division of General Internal Medicine and Health Services Research, David Geffen School of Medicine at UCLA , Los Angeles, California 90095 , USA
3. Division of Nephrology, Kidney Research Institute, University of Washington , Seattle, Washington 98104 , USA
4. Division of Nephrology, University of Washington , Seattle, Washington 98195 , USA
5. Providence Medical Research Center, Providence Health Care , Spokane, Washington 99204 , USA
6. Department of Diabetes, Endocrinology and Nutrition, Graduate School of Medicine, Kyoto University , Kyoto 6068315 , Japan
7. Department of Social Epidemiology, Graduate School of Medicine, Kyoto University , Kyoto 6068315 , Japan