1. Institute of Clinical Medicine, College of Medicine National Cheng Kung University Tainan Taiwan
2. Department of Anesthesiology Chi Mei Medical Center Tainan Taiwan
3. Department of Medical Research Chi Mei Medical Center Tainan Taiwan
4. Graduate Institute of Clinical Medicine, College of Medicine National Taiwan University Taipei Taiwan
5. Clinical Medicine Research Center, National Cheng Kung University Hospital, College of Medicine National Cheng Kung University Tainan Taiwan