1. Department of Emergency Medicine, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei 231, Taiwan
2. Department of Emergency Medicine, School of Medicine, Tzu Chi University, Hualien 970, Taiwan
3. Department of Medical Education, Changhua Christian Hospital, Changhua 500, Taiwan
4. Department of Medicine, College of Medicine, Tzu Chi University, Hualien 970, Taiwan
5. Department of Orthopedic Surgery, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei 231, Taiwan
6. Department of Orthopedics, School of Medicine, Tzu Chi University, Hualien 970, Taiwan
7. Department of Research, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei 231, Taiwan