1. School of Medicine, College of Medicine, Chang Gung University, Taoyuan City, Taiwan
2. Department of Medical Education, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan
3. Department of Public Health, College of Medicine, Chang Gung University, Taoyuan City, Taiwan
4. Biostatistics Core Laboratory, Molecular Medicine Research Center, Chang Gung University, Taoyuan City, Taiwan
5. Division of Rheumatology, Allergy and Immunology, Department of Internal Medicine, Chang Gung Memorial Hospital at Linkou, Taoyuan City, Taiwan.