1. Department of Family Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
2. Department of Family Medicine, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
3. Institute of Public Health, School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
4. Office of the Deputy Superintendent, National Yang Ming Chiao Tung University Hospital, Ilan, Taiwan, ROC