1. Pediatric Department, Oslo University Hospital, Ullevål, Postboks 4950 Nydalen, 0424 Oslo, Norway
2. Faculty of Medicine, University of Oslo, Postboks 1078 Blindern, Oslo 0316, Norway
3. Oslo Diabetes Research Centre, Postboks 4959 Nydalen, Oslo 0424, Norway
4. Department of Radiology and Nuclear Medicine, St Olavs University Hospital, Postboks 3250 Sluppen, Trondheim 7006, Norway
5. Institute of Circulation and Medical Imaging, Norwegian University of Science and Technology, Postboks 8905, Trondheim 7491, Norway
6. Oslo Centre for Biostatistics and Epidemiology, Research Support Services, Oslo University Hospital, Postboks 1122 Blindern, Oslo 0317, Norway
7. Center for Clinical Heart Research and Department of Cardiology, Oslo University Hospital, Kirkeveien 166, Oslo 0407, Norway
8. Pediatric Department, Akershus University Hospital, Sykehusveien 25, Lørenskog 1478, Norway
9. Department of Endocrinology, Oslo University Hospital, Aker, Trondheimsveien 235, Oslo 0586, Norway