1. Korea University College of Medicine, Seoul, Korea;
2. Division of Endocrinology, Department of Internal Medicine, Korea University Guro Hospital, Seoul, Korea;
3. Korea University College of Nursing, Seoul, Korea;
4. Division of Rheumatology, Department of Internal medicine, Korea University Guro Hospital, Seoul, Korea;
5. Division of Rheumatology, Department of Internal Medicine, Korea University Ansan Hospital, Ansan-si, Gyeonggi-do, Korea