1. Center for Cardiological Innovation, Songsvannsveien 9, Oslo 0372, NorwaybGE Vingmed Ultrasound AS, Strandpromenaden 45, Horten 3183, NorwaycUniversity of Oslo, Department of Informatics, Gaustadalléen 23 B, Oslo 0373, Norway
2. Center for Cardiological Innovation, Songsvannsveien 9, Oslo 0372, NorwaydOslo University Hospital, Department of Cardiology and Pediatrics, P.O. Box 1072, Blindern, Oslo 0316, Norway
3. GE Vingmed Ultrasound AS, Strandpromenaden 45, Horten 3183, Norway