1. From the Departments of Molecular Medicine and Anatomy (O.I., M.M.A., T.I., Ta.T., To.Taki.), Obstetrics and Gynecology (R.K., G.I., K.Y., H.A., To.Take.), and Pediatrics (M.M.), Nippon Medical School, Tokyo, Japan; Department of Obstetrics and Gynecology (A.O., C.H., K.T., A.I., S.M.), Jichi Medical University, Tochigi, Japan; First Clinical College of Harbin Medical University (S.L.), Harbin, China.