1. Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases , Seoul, Republic of Korea
2. Hanyang University Institute for Rheumatology Research , Seoul, Republic of Korea
3. Department of Information Statistics, Andong National University , Andong, Republic of Korea
4. Department of Statistics, Kyungpook National University , Daegu, Republic of Korea
5. College of Pharmacy, Chung-Ang University , Seoul, Republic of Korea