1 Department of Pediatrics and Adolescent Medicine, The University Hospital, Rigshospitalet, 2100 Copenhagen, Denmark; Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark. Electronic address: [email protected].
2 Department of Pediatrics and Adolescent Medicine, The University Hospital, Rigshospitalet, 2100 Copenhagen, Denmark.
3 Department of Pediatrics and Adolescent Medicine, The University Hospital, Rigshospitalet, 2100 Copenhagen, Denmark; Section of Biostatistics, Department of Public Health, University of Copenhagen, Copenhagen, Denmark.