1. Department of Internal Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, 7 Chung-Shan South Road, Taipei 100, Taiwan
2. Institute of Clinical Medicine, National Yang-Ming University School of Medicine, 109, Section 2, Li-Nong Street, Taipei 112, Taiwan
3. Division of Immunology, Rheumatology, and Allergy, Buddhist Dalin Tzu-Chi General Hospital, 2 Ming-Shen Road, Chia-Yi 622, Taiwan
4. Division of Allergy, Immunology, and Rheumatology, Taipei Veterans General Hospital, 201 Shih-Pai Road, Taipei 112, Taiwan