[1
]Department of Veterinary Population Medicine; University of Minnesota; St Paul MN
55108 U.S.A.
[2
]Ecology Center and Department of Biology; Utah State University; Logan UT 84321 U.S.A.
[3
]Department of Fish and Wildlife Conservation; Virginia Tech, Blacksburg; VA 24061
U.S.A.
[4
]School of Biological Sciences; University of Tasmania; Hobart 7001 Australia
[5
]Department of Biology; McGill University; Montreal H3A 1B1 Canada
[6
]Department of Microbiology, Immunology and Pathology; Colorado State University; Fort
Collins CO 80523 U.S.A.
[7
]Department of Ecology and Evolutionary Biology; University of Tennessee; Knoxville
TN 37996 U.S.A.
[8
]Department of Biology, The Center for Infectious Disease Dynamics; The Pennsylvania
State University; University Park PA 16802 U.S.A.