1. Department of Otorhinolaryngology, Nordsjællands Hospital, University of Copenhagen , Hillerød , Denmark
2. Department of Otorhinolaryngology Head & Neck Surgery and Audiology, University Hospital Copenhagen Rigshospitalet , Copenhagen , Denmark
3. Faculty of Health and Medical Sciences, University of Copenhagen , Copenhagen , Denmark
4. Department of Infectious Diseases, University Hospital Aalborg , Aalborg , Denmark
5. Department of Clinical Biochemistry, Bispebjerg Hospital, University of Copenhagen , Copenhagen , Denmark
6. Department of Neurology, University Hospital Copenhagen Rigshospitalet , Copenhagen , Denmark
7. Department of Pulmonary and Infectious Diseases, Nordsjællands Hospital, University of Copenhagen , Hillerød , Denmark
8. Department of Infectious Diseases, Zealand University Hospital, University of Copenhagen , Roskilde , Denmark