1. Department of Pediatric Anesthesia and Intensive Care; Queen Silvia's Children Hospital; Gothenburg; Sweden
2. Department of Pediatric Cardiology; Queen Silvia's Children Hospital; Gothenburg; Sweden
3. Department of Cardiothoracic; Sahlgrenska University Hospital; Gothenburg; Sweden
4. Department of Medicine/Haematology and Coagulation Disorders; Sahlgrenska University Hospital; Gothenburg; Sweden