1. Department of Family Medicine; College of Medicine; National Taiwan University and Hospital; Taipei Taiwan
2. Department of Health Care Management; National Taipei University of Nursing and Health Sciences; Taipei Taiwan
3. Division of Geriatric Research; Institute of Population Health Science; National Health Research Institutes; Miaoli Taiwan
4. Department of Internal Medicine; College of Medicine; National Taiwan University and Hospital; Taipei Taiwan
5. Institute of Epidemiology and Preventive Medicine; College of Public Health; National Taiwan University; Taipei Taiwan