1. EcoHealth Alliance, 460 W. 34th St., Floor 17, New York, New York 10001, USA
2. Department of Forestry and Wildlife Management, Hedmark University College, Campus Evenstad, NO-2418 Elverum, Norway
3. Section of Arctic Veterinary Medicine, Norwegian School of Veterinary Science, Stakkevollveien 23B, NO-9292 Tromsø, Norway
4. Norwegian Institute for Nature Research (NINA), Postboks, 5685 Sluppen, 7485 Trondheim, Norway
5. Department of Wildlife, Fish and Environmental Studies, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden