1. Division of Cardiology, Department of Medicine, Institute for Stem Cell Biology and Regenerative Medicine and Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA 94305, USA
2. CiSTEM Laboratory, Convergent Research Consortium for Immunologic Disease, Seoul St. Mary’s Hospital, College of Medicine, Catholic University of Korea, Seoul 137-701, Republic of Korea
3. Division of Rheumatology, Department of Internal Medicine, Seoul St. Mary’s Hospital, Institute of Medical Science, College of Medicine, Catholic University of Korea, Seoul 137-701, Republic of Korea