1. Wellington-Dufferin-Guelph Public Health; Guelph ON Canada
2. Institut für Parasitologie; Universität Bern; Bern Switzerland
3. National Veterinary Institute; Uppsala Sweden
4. Tropical Diseases Unit, Toronto General Hospital; Toronto ON Canada
5. Public Health Ontario Laboratories; Toronto ON Canada
6. University of Toronto; Toronto ON Canada
7. Ontario Veterinary College; University of Guelph; Guelph ON Canada