1 The Child and Adolescent Clinic, The Juliane Marie Center, The Danish National University Hospital "Rigshospitalet", Denmark.
2 The Pediatric and Adolescent Department, Copenhagen University Hospital, Herlev, Gentofte, Denmark.
3 Department of Neonatology, The Juliane Marie Center, The Danish National University Hospital "Rigshospitalet", Denmark.
4 Department of Clinical Biochemistry, Centre of Diagnostic Investigations, The Danish National University Hospital Rigshospitalet, Copenhagen, Denmark.
5 Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
6 Steno Diabetes Center Copenhagen, Herlev, Denmark.