1. From the Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital Herlev-Gentofte, Copenhagen, Denmark
2. Faculty of Medical and Health Sciences, University of Copenhagen, Copenhagen, Denmark
3. Department of Clinical Microbiology, Copenhagen University Hospital Herlev-Gentofte, Copenhagen, Denmark
4. Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark.