1. Department of Medical Ultrasonics Institute of Diagnostic and Interventional Ultrasound The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
2. Reproductive Medicine Centre The Key Laboratory for Reproductive Medicine of Guangdong Province The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
3. Department of Pathology The Seventh Affiliated Hospital of Sun Yat‐sen University Shenzhen China
4. Department of Pathology The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China
5. Department of Andrology The First Affiliated Hospital of Sun Yat‐sen University Guangzhou China