1. The Rheumatism Research Centre; Catholic Research Institute of Medical Science; The Catholic University of Korea; Seocho-gu Seoul South Korea
2. Division of Rheumatology; Department of Internal Medicine; Centre for Rheumatic Disease; Seoul St Mary's Hospital; The Catholic University of Korea; Seocho-gu Seoul South Korea
3. Department of Obstetrics and Gynecology; Ewha Woman University School of Medicine; Seoul South Korea