1. Department of Internal Medicine; National Taiwan University Hospital; Taipei Taiwan
2. Graduate Institute of Clinical Medicine; College of Medicine; National Taiwan University; Taipei Taiwan
3. Department of Internal Medicine; Far Eastern Memorial Hospital; New Taipei City Taiwan
4. Division of Biostatistics; Graduate Institute of Epidemiology; College of Public Health; National Taiwan University; Taipei Taiwan
5. Department of Otolaryngology; National Taiwan University Hospital; Taipei Taiwan
6. Department of Surgery; National Taiwan University Hospital; Taipei Taiwan