1 Imaging Department, Harefield Hospital, Royal Brompton and Harefield Hospitals, Harefield, United Kingdom; Department of Echocardiography Training "Dimitrios Belntekos", "Tzaneio" General Hospital of Piraeus, Piraeus, Greece. Electronic address: nmiaris@gmail.com.
2 Department of Echocardiography Training "Dimitrios Belntekos", "Tzaneio" General Hospital of Piraeus, Piraeus, Greece.