1. School of Medicine; Chung Shan Medical University; Taichung Taiwan
2. Department of Medical Research; Chung Shan Medical University; Taichung Taiwan
3. Department of Statistics; Chung Shan Medical University; Taichung Taiwan
4. Department of Health Policy and Management; Chung Shan Medical University; Taichung Taiwan
5. Division of Allergy, Immunology and Rheumatology; Chung Shan Medical University; Taichung Taiwan