1. Odense University Hospital; Centre for Evidence-Based Medicine Odense (CEBMO); Kløvervaenget 10, 13. Floor Odense Denmark 5000
2. The University of Sydney; Charles Perkins Centre and School of Pharmacy, Faculty of Medicine and Health; D17, 6th floor, Charles Perkins Centre, , The University of Sydney | NSW | 2006 Camperdown, Sydney NSW Australia 2006
3. Aarhus University Hospital; Otorhinolaryngology and Head & Neck Surgery; 1st Floor, Building 10 Nørrebrogade 44 Aarhus Denmark 8000
4. Rigshospitalet; Nordic Cochrane Centre; Blegdamsvej 9, 7811 Copenhagen Denmark 2100
5. Odense University Hospital and University of Southern Denmark; Center for Evidence-Based Medicine; Sdr. Boulevard 29, Gate 50 (Videncenteret) Odense Denmark 5000
6. Hvidovre Hospital; Department of Infectious Diseases; Kettegård Allé 30 Hvidovre Denmark 2650
7. Odense University Hospital; Open Patient data Explorative Network (OPEN); Odense Denmark