1 Nursing Department, Evagelismos General Hospital of Athens, Athens, Greece. Electronic address: a.klisiari@gmail.com.
2 Department of Intensive Care Medicine, Medical School, National and Kapodistrian University of Athens, Athens, Greece. Electronic address: akotanid@gmail.com.
3 First Department of Cardiology, Athens University School of Medicine, Athens, Greece. Electronic address: ktoutouz@gmail.com.
4 First Department of Cardiology, Athens University School of Medicine, Athens, Greece. Electronic address: asm@otenet.gr.