1. Department of Anaesthesiology and Pain Medicine; Incheon St. Mary's Hospital; College of Medicine; The Catholic University of Korea; Seoul; South Korea
2. Department of Anaesthesiology and Pain Medicine; Seoul St. Mary's Hospital; College of Medicine; The Catholic University of Korea; Seoul; South Korea
3. Department of Surgery; Seoul St. Mary's Hospital; College of Medicine; The Catholic University of Korea; Seoul; South Korea
4. The Rheumatism Research Center; Catholic Research Institute of Medical Science; The Catholic University of Korea; Seoul; South Korea