1. Department of Obstetrics and Gynecology, Nissay Hospital, Osaka, Japan
2. Department of Human Nutritional Science, Osaka Shoin Women’s University Graduate School, Osaka, Japan
3. Department of Obstetrics and Gynecology, Osaka Police Hospital, Osaka, Japan
4. Department of Gastroenterology and Hepatology, Osaka University Graduate School of Medicine, Osaka, Japan
5. Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Osaka, Japan