MING WANG
NAOHIRO WATANABE
HIROSHI OHTOMO
Dept. Trpical Medicine, Jikei University Shool of Medicine, 3-25-8 Nishi-shinbashi, Minato-ku, Tokyo, Japan

TOMOKO SHOMURA
Pharmaceutical Research Center, Meiji Seika Ltd., 760 Morooka-cho, Kohoku-ku, Yokohama, Japan