1. Department of Critical Care Medicine, Higashiosaka City Medical Center, Higashiosaka, Osaka Prefecture, Japan
2. Nursing Department, Higashiosaka City Medical Center, Higashiosaka, Osaka Prefecture, Japan
3. Department of Nephrology, Higashiosaka City Medical Center, Higashiosaka, Osaka Prefecture, Japan
4. Department of Cardiovascular Surgery, Higashiosaka City Medical Center, Higashiosaka, Osaka Prefecture, Japan