1 The Department of Infectious Diseases, Copenhagen University Hospital, Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen, Denmark.
2 Cystic Fibrosis Center Copenhagen, Department of Pediatric and Adolescent Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
3 The Department of Public Health, University of Copenhagen, Copenhagen, Denmark.
4 The University Hospital Center for Health Research (UCSF), Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
5 Department of Psychology, University of Miami, Coral Gables, FL USA.
6 Center of Adolescent Medicine, Department of Pediatric and Adolescent Medicine, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.