Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. ana65641@nifty.com. Department of Healthcare Epidemiology, School of Public Health in the Graduate School of Medicine, Kyoto University, Kyoto, Japan. Institute for Health Outcomes and Process Evaluation Research (iHope International), Kyoto, Japan. Human Health Sciences, Graduate School of Medicine, Kyoto University, Kyoto, Japan. Department of Medicine and Clinical Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. Department of Nephrology, Nara Medical University, Nara, Japan. Department of Metabolism, Endocrinology and Molecular Medicine, Osaka City University Graduate School of Medicine, Osaka, Japan.