1. The Howard Gilman Institute for Heart Valve Disease and the Schiavone Institute for Cardiovascular Research, State University of New York Downstate Medical Center, Brooklyn, New York, United States
2. Division of Medicine, Department of Cardiology B, Oslo University Hospital and Institute of Clinical Sciences, University of Oslo, Oslo, Norway
3. Bethany Beach, Delaware, United States
4. Department of Cardiology, Dong-A University, Busan, South Korea
5. Department of Neurology, Johns Hopkins University, Baltimore, Maryland, United States