1. Department of Parasitology and Immunology, University of Tokushima School of Medicine, Tokushima,
2. Institute for Experimental Animal Science, Nagoya City University Medical School, Nagoya,
3. Institute for Animal Experimentation, University of Tokushima School of Medicine, Tokushima,
4. Tokushima Research Institute, Otsuka Pharmaceutical Co. Ltd, Tokushima,
5. The Research Center for Protozoan Molecular Immunology, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan