1. Division of Infection Control and Prevention, Niigata University Graduate School of Medical and Dental Sciences, Niigata University Medical School, Niigata, Japan.
2. Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata University Medical School, Niigata, Japan.
3. Division of Infection Control and Prevention, Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, Niigata University Medical School, Niigata, Japan.