1. Department of Emergency Medicine; Ziekenhuis St Jansdal; Harderwijk Netherlands
2. Department of Internal Medicine; Ziekenhuis Gelderse Vallei; Ede Netherlands
3. Julius Center for Health Sciences and Primary Care; University Medical Center Utrecht, Utrecht University; Utrecht Netherlands
4. Cochrane Infectious Diseases Group; Liverpool School of Tropical Medicine; Liverpool UK
5. Groningen Research Institute of Pharmacy; University Groningen; 9713 AV Groningen Netherlands
6. evidENT, Ear Institute; University College London; London UK
7. Julius Center for Health Sciences and Primary Care & Department of Otorhinolaryngology; University Medical Center Utrecht, Utrecht University; Utrecht Netherlands
8. National Institute of Health Research; University College London Hospitals Biomedical Research Centre; London UK
9. Department of Pediatric Immunology and Infectious Diseases; Wilhelmina Children's Hospital, University Medical Center Utrecht, Utrecht University; Utrecht Netherlands
10. Center for Infectious Diseases; The National Institute for Public Health and the Environment; Bilthoven Netherlands