1. Departments of Pediatrics, Obstetrics and Gynecology and Pathology, Women and Infants Hospital of Rhode Island, Warren Alpert Medical School of Brown University, Providence, RI, USA
2. Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
3. Department of Genetics, Osaka University Graduate School of Medicine, Osaka, Japan
4. Deaprtment of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, TX, USA
5. Magee-Womens Research Institute, Department of Obstetrics and Gynecology, University of Pittsburgh, PA, USA
6. Department of Obstetrics and Gynecology, Faculty of Medicine, University of Toyama, Toyama, Japan