1. Department of Molecular and Cellular Parasitology; Juntendo University School of Medicine; 2-1-1 Hongo; Bunkyo-ku; Tokyo; 113-8421; Japan
2. Department of Pharmacology; Juntendo University School of Medicine; Bunkyo-ku; Tokyo; 113-8421; Japan
3. Institute of Biological Sciences; University of Tsukuba; 1-1-1 Tennoudai; Tsukuba; Ibaraki; 305-8572; Japan