Department of Obstetrics and Gynecology, Keio University School of Medicine, Tokyo, Japan
Reprint requests: Satoshi Asai, M.D., Department of Obstetrics and Gynecology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan 160–8582 (FAX: 81-3-3226-1667).
S.A. has nothing to disclose. H.A. has nothing to disclose. M.F. has nothing to disclose. H.I. has nothing to disclose. M.T. has nothing to disclose. Y.Y. has nothing to disclose.