1 Hospital Care Research Unit, Department of Respiratory Medicine, Hyogo Prefectural Amagasaki General Medical Center, Amagasaki, Hyogo, Japan. Electronic address: [email protected].
2 Hospital Care Research Unit, Department of Nephrology, Hyogo Prefectural Amagasaki General Medical Center, Amagasaki, Hyogo, Japan.
3 Department of Healthcare Epidemiology, Graduate School of Medicine and Public Health, Kyoto University, Kyoto, Japan.