1. Laboratory of Translational Gastroenterology, Department of Gastroenterology, Qilu Hospital of Shandong University, Jinan, Shandong, China
2. Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, China
3. National Clinical Research Center for Obstetrics and Gynecology (Peking University Third Hospital), Beijing, China
4. Key Laboratory of Assisted Reproduction, Ministry of Education (Peking University), Beijing, China
5. Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China
6. Department of Gastroenterology, Laboratory of Translational Gastroenterology, Qilu Hospital of Shandong University, Jinan, Shandong, China