1. Department of Circulation and Medical Imaging; Norwegian University of Science and Technology (NTNU); Trondheim Norway
2. Department of Pediatrics; St. Olav's University Hospital; Trondheim Norway
3. Department of Pediatric Medicine; Section for Pediatric Cardiology; Oslo University Hospital; Oslo Norway
4. Department of Anesthesiology and Emergency Medicine; St. Olav's University Hospital; Trondheim Norway
5. Department of Cardiology; St. Olav's University Hospital; Trondheim Norway
6. Levanger Hospital; Nord-Trøndelag Health Trust; Levanger Norway
7. MI-Laboratory; Department of Circulation and Medical Imaging; NTNU; Trondheim Norway