Paul A. Iaizzo is a Professor in the Visible Heartâ Laboratories, Department of Surgery, at the University of Minnesota. Tinen Iles is an Assistant Professor, Department of Surgery, at the University of Minnesota. Massimo Griselli is a Pediatric Cardiac Surgeon at the Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne, London, England. James St. Louis is chief of the Section of Pediatric and Congenital Heart Surgery in the Department of Surgery at the Medical College of Georgia at Augusta University.