University Hospital Copenhagen, Rigshospitalet, Copenhagen, Denmark
Odense University Hospital, Department of Cardiac, Thoracic and Vascular Surgery, Odense, Denmark
Department of Cardiac and Thoracic Surgery, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
Shands Hopsital at University of Florida, Gainesville, Florida, United States
Shands Hospital at Alachua General Hospital, Gainesville, Florida, United States