1. Center of Adolescent Medicine, Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital , Rigshospitalet, Copenhagen , Denmark
2. Department of Dermatology and Allergy, Herlev and Gentofte Hospital, University of Copenhagen , Copenhagen , Denmark
3. University Hospitals Centre for Health Research (UCSF), Copenhagen University Hospital , Rigshospitalet, Copenhagen , Denmark
4. Center of Adolescent Medicine, Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital , Rigshospitalet, Blegdamsvej 9, 2100 Copenhagen , Denmark