About the Authors

Madelaine Norström

madelaine.norstrom@vetinst.no

Affiliation Department of Health Surveillance, Norwegian Veterinary Institute, Oslo, Norway

Anja Bråthen Kristoffersen

Affiliation Department of Health Surveillance, Norwegian Veterinary Institute, Oslo, Norway

Franziska Sophie Görlach

Affiliations Department of Health Surveillance, Norwegian Veterinary Institute, Oslo, Norway, Technische Universität München, München, Germany

Karin Nygård

Affiliation Department of Infectious Disease Epidemiology, Division of Infectious Disease Control, Norwegian Institute of Public Health, Oslo, Norway

Petter Hopp

Affiliation Department of Health Surveillance, Norwegian Veterinary Institute, Oslo, Norway

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PH MN ABK. Performed the experiments: ABK PH FG. Analyzed the data: ABK FG. Contributed reagents/materials/analysis tools: KN PH MN FG ABK. Wrote the paper: MN ABK FG KN PH.