1. Department of Gynaecology and Obstetrics, The Seventh People’s Hospital of Chengdu, Chengdu, Sichuan, China;
2. Department of Neurology, Affiliated Sichuan Provincial Rehabilitation Hospital of Chengdu University of TCM, Chengdu, Sichuan, China;
3. Department of Neurology, Bazhong Central Hospital, Bazhong, Sichuan, China;
4. Departments of Radiology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China