Viktor Hraška, MD, PhD, was trained at Boston Children’s Hospital, USA. For the past 12 years he has been in charge of the pediatric cardiac surgical programs at the Children’s Hospital, Bratislava, Slovakia and University Hospital Eppendorf Hamburg, Germany. Currently he is the surgeon-in-chief of the German Pediatric Heart Center, Sankt Augustin, Germany, which is responsible for one of the leading programs in the country. He is the author or co-author of more than 50 papers published in peer review journals. He has also contributed to two books on cardiac surgery. Currently he serves on the editorial board of the World Journal for Pediatric and Congenital Heart Surgery and is a reviewer for the Journal of Cardiothoracic Surgery, Annals of Thoracic Surgery and European Journal of Cardiothoracic Surgery.Peter Murín, MD, is a Cardiac Surgical Resident at the German Pediatric Heart Center, Sankt Augustin, Germany. He previously started his surgical training at the Adult Cardiac Surgery Department, Oldenburg, Germany from 2006 to 2008 after receiving his MD at the Medical School, Comenius University, Bratislava, Slovakia.