1. Department of Cardiovascular Medicine, Gachon Cardiovascular Research Institute, Gachon University Gil Medical Center, Incheon, Korea.
2. Division of Pulmonology, Department of Internal Medicine, Hallym University Gangdong Sacred Heart Hospital, Seoul, Korea.
3. Division of Rheumatology, Department of Internal Medicine, Soonchunhyang University Hospital, Bucheon, Korea.
4. Division of Pediatric Cardiology, Department of Pediatrics, Yonsei University Severance Hospital, Seoul, Korea.
5. Department of Preventive Medicine, Gachon University School of Medicine, Incheon, Korea.
6. Division of Rheumatology, Department of Internal Medicine, Korea University Ansan Hospital, Ansan, Korea.
7. Division of Cardiology, Department of Internal Medicine, Soonchunhyang University Hospital, Bucheon, Korea.
8. Division of Pulmonology, Department of Internal Medicine, University of Ulsan, Asan Medical Center, Seoul, Korea.
9. Division of Cardiology, Department of Internal Medicine, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea.