1. Department of Internal Medicine Cleveland Clinic Cleveland Ohio USA
2. Centre for Diagnosis and Treatment of Pericardial Diseases Section of Cardiovascular Imaging Department of Cardiovascular Medicine Heart, Vascular, and Thoracic Institute, Cleveland Clinic Cleveland Ohio USA
3. Department of Internal Medicine MedStar Georgetown University Hospital Washington, D.C. USA
4. Department of Anatomic Pathology Cleveland Clinic Cleveland Ohio USA