Correspondence: Hiroshi Ohara

Hiroshi Ohara*, Eitaro Hori
Department of Medical Zoology, Saitama Medical School, Moroyama, Iruma, Saitama 350-04, Japan

Setsuko Tsukidate and Koichiro Fujita
Department of Medical Zoology. FAculty of Medicine, tokyo Medical and Dental Unversity, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113, Japan

*Present address: Bureau of International Cooperation, International Medical Center of Japan, 1-21-1, Toyama, Shinjyuku-ku, Tokyo 162, Japan