Affiliation: | 1. Department of Obstetrics and Gynecology, Graduate School of Medicine, The University of Tokyo, Bunkyo‐ku, Tokyo, Japan;2. Department of Obstetrics, Gynecology and Women's Health, University of Missouri, Columbia, Missouri;3. Tsumura Kampo Research Laboratories, Kampo Research and Development Division, Tsumura & Co., Minato‐ku, Tokyo, Japan;4. Department of Obstetrics and Gynecology, Faculty of Medicine, Nihon University, Tokyo, Japan |