1 Institute of Biodiversity, Animal Health and Comparative Medicine, Boyd Orr Centre for Population and Ecosystem Health, University of Glasgow, Glasgow, G12 8QQ, United Kingdom. grant.hopcraft@glasgow.ac.uk.
2 Frankfurt Zoological Society, P.O. Box 14935, Arusha, Tanzania. grant.hopcraft@glasgow.ac.uk.
3 Tanzania Wildlife Research Institute, P.O. Box 661, Arusha, Tanzania.
4 Institute of Biodiversity, Animal Health and Comparative Medicine, Boyd Orr Centre for Population and Ecosystem Health, University of Glasgow, Glasgow, G12 8QQ, United Kingdom.
5 Frankfurt Zoological Society, P.O. Box 14935, Arusha, Tanzania.
6 Tanzania National Parks, P.O. Box 3134, Arusha, Tanzania.
7 Centre for Biodiversity Research, University of British Columbia, 6270 University Boulevard, Vancouver, BC, V6T 1Z4, Canada.
8 Eno Hall, Princeton University, Princeton, NJ, 08544-1003, U.S.A.
9 Parliamentary Committee on Land, Natural Resources and Environment, Tanzania, P.O. Box 1065, Kahama, Tanzania.