1. Department of Neurosurgery, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, PR China;
2. Department of Neurosurgery, Affiliated Hospital of North Sichuan Medical College, Nanchong, PR China;
3. Department of Obstetrics and Gynaecology, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, PR China;
4. Department of Neurosurgery, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, PR China;
5. Department of Neurosurgery, The Jinjiang Municipal Hospital, Quanzhou, PR China