1. First Faculty of Medicine, Charles University, Prague, Czech Republic
2. 2nd Department of Cardiovascular Surgery, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
3. Division of Cardiovascular Surgery, Department of Surgery, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
4. Division of Cardiovascular Surgery, Kaohsiung Medical University School of Medicine, Chung-Ho Memorial Hospital, Kaohsiung, Taiwan, ROC
5. Department of Thoracic and Cardiovascular Surgery, Research Institute, Cleveland Clinic, Cleveland, USA
6. Division of Cardiology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
7. Center for Vascular and Endovascular Surgery, Clinical Center of Serbia, Belgrade, Serbia