1. Department of Cardiology (N.G.K., P.P.), University of Patras Medical School, Greece.
2. Department of Cardiology, University Hospital of South Manchester NHS Foundation Trust, Manchester, United Kingdom (I.K.).
3. Intensive Care Unit (V.M.), University of Patras Medical School, Greece.
4. Department of Internal Medicine (D.V.), University of Patras Medical School, Greece.