Wojciech Mazur, Professor of Clinical Medicine and Pediatrics, The Christ Hospital Heart and Vascular Center of Greater Cincinnati, OH, USA • Marilyn Siegel, Professor of Radiology and Pediatrics, Mallinckrodt Institute of Radiology, St Louis, MO, USA •Tomasz Miszalski-Jamka, Deputy Head of the Center for Diagnosis, Prevention and Telemedicine, John Paul II Hospital, Krakow, Poland • Robert Pelberg, Associate Professor of Clinical Medicine, The Christ Hospital Heart and Vascular Center of Greater Cincinnati, OH, USA.