1. Department of Critical Care, Mackay Memorial Hospital, Taipei, Taiwan
2. Department of Emergency Medicine, National Taiwan University Medical College and Hospital, Taipei, Taiwan
3. Cardiovascular Center, Taichung Veterans General Hospital, Taichung, Taiwan
4. Department of Critical Care Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
5. Department of Neurology, Taipei Medical University, Shuang-Ho Hospital, New Taipei, Taiwan
6. Department of Medicine, Mackay Medical College, New Taipei, Taiwan