1 Retired from Department of Internal Medicine, School of Medicine, Washington University, School of Medicine, Washington University, 660 S Euclid Ave, St. Louis, MO 63110, USA. wsumner@wustl.edu.
2 Department of Cardiology, Onassis Cardiac Surgery Center, Sygrou 356, 17674 Kallithea, Greece. kfarsalinos@gmail.com.