1. Department of Obstetrics, Guangzhou Women and Children's Medical CenterGuangzhou Medical University Guangzhou Guangdong Province China
2. Department of Neurosurgery, The Third Affiliated HospitalSun Yat‐sen University Guangzhou Guangdong Province China
3. Department of Neurosurgery, Guangzhou First People's HospitalGuangzhou Medical University Guangzhou Guangdong Province China