1. Department of Medical Examination Center, Hebei Medical University, Hebei General Hospital, Shijiazhuang 050051, Hebei, China
2. Department of Neurosurgery, 980 Hospital of PLA Joint Logistics Support Forces, Shijiazhuang 050051, Hebei, China
3. Medical Examination Center, Hebei General Hospital, Shijiazhuang 050051, Hebei, China
4. Department of Second Division of Geriatrics, Hebei General Hospital, Shijiazhuang 050051, Hebei, China
5. Department of Medical Imaging and Ultrasound, Hebei Medical University, Hebei General Hospital, Shijiazhuang 050051, Hebei, China
6. Ultrasound Department, Hebei Medical University, Hebei General Hospital, Shijiazhuang 050051, Hebei, China