1. Department of Infectious Diseases, St Luke’s International Hospital, Tokyo, Japan
2. Department of General Internal Medicine, St Luke’s International Hospital, Tokyo, Japan
3. Graduate School of Public Health, St Luke’s International University, Tokyo, Japan
4. Department of Nephrology, St Luke’s International Hospital, Tokyo, Japan
5. Quality Improvement Center, St Luke’s International Hospital, Tokyo, Japan
6. Department of Clinical Laboratory Center, St Luke’s International Hospital, Tokyo, Japan