1. Department of Internal Medicine, University of South Dakota, Sioux Falls, SD 57105, USA
2. Heart Institute, Hadassah University Medical Center, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem P.O. Box 12000, Israel
3. Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN 55902, USA
4. Department of Cardiovascular Medicine, University of Nebraska Medical Center, Omaha, NE 68198, USA
5. Faculty of Health Sciences, Ben Gurion University of the Negev, Beersheva P.O. Box 653, Israel
6. Department of Cardiology, Soroka University Medical Center, Rager Av., Beersheva P.O. Box 84101, Israel
7. Department of Cardiovascular Medicine, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA