1. Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine; The University of Tokyo; Tokyo Japan
2. Department of Life Support Technology (Molten), Graduate School of Medicine; The University of Tokyo; Tokyo Japan
3. Department of Neurosurgery; Tokyo Medical University; Tokyo Japan
4. Department of Anesthesiology; Tokyo Women's Medical University; Tokyo Japan
5. Department of Anesthesiology; Tokyo Metropolitan Police Hospital; Tokyo Japan