1. Epidemiology and Biostatistics Center, Changhua Christian Hospital, Changhua, Taiwan.
2. Institute of Injury Prevention and Control, College of Public Health, Taipei Medical University, Taipei, Taiwan.
3. School of Public Health, China Medical University, Taichung, Taiwan.
4. Department of Emergency Medicine, Taipei Medical University Hospital, Taipei, Taiwan.
5. Master Program in Long-Term Care, College of Nursing, Taipei Medical University, Taipei, Taiwan.