1. Department of Dermatology; Chang Gung Memorial Hospital; Taipei Taiwan
2. School of Medicine; College of Medicine; Chang Gung University; Taoyuan Taiwan
3. School of Medicine; College of Medicine; Taipei Medical University; Taipei Taiwan
4. Department of Family Medicine; Chang Gung Memorial Hospital; Linkou Taiwan
5. Department of Health Care Management and Graduate Institute of Business and Management; College of Management; Chang Gung University; Taoyuan Taiwan