1. State Key Laboratory of Reproductive Medicine; Department of Histology and Embryology; Nanjing Medical University; Jiangning, Nanjing China
2. Department of Prenatal Diagnosis; Obstetrics and Gynecology Hospital Affiliated to Nanjing Medical University; Nanjing China
3. Department of Anatomy; Nanjing Medical University; Jiangning, Nanjing China
4. Department of Cardio-thoracic Surgery; First Affiliated Hospital with Nanjing Medical University; Nanjing China
5. Department of Gastroenterology; First Affiliated Hospital with Nanjing Medical University; Nanjing China
6. Department of Gastroenterology; Zhongda Hospital; School of Medicine; Southeast University; China
7. Previously Department of Gastroenterology; First Affiliated Hospital with Nanjing Medical University; Nanjing China