Institution: | 1.Laboratory of Veterinary Ethology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657, Japan ;3.Fukagawa Office, Ikari Shodoku Corporation, 4-2 Fuyuki, Koto-ku, Tokyo, 135-0041, Japan ;4.Technical Research Laboratory, Ikari Shodoku Corporation, 1-12-3 Akanehama, Narashino-shi, Chiba, 275-0024, Japan ; |