1. Section for Zoonotic Ecology and Epidemiology, School of Pure and Applied Natural Sciences, University of Kalmar391 82 Kalmar, Sweden
2. Aquatic Biology and Chemistry Group, Kristianstad University291 88 Kristianstad, Sweden
3. Department of Virology, Erasmus Medical Center3000 CA, Rotterdam, The Netherlands
4. Section of Infectious Diseases, Department of Medical Sciences, Uppsala University Hospital751 85 Uppsala, Sweden
5. Bird Ringing Centre, Swedish Museum of Natural History10405 Stockholm, Sweden
6. Kalmar County Hospital381 95 Kalmar, Sweden
7. Department of Animal Ecology, Lund University22100 Lund, Sweden