1. Department of Neurosurgery, Hyogo Emergency Medical Center and Kobe Red Cross Hospital, Kobe, Japan.
2. Department of Neurosurgery, Kobe University Graduate School of Medicine, Kobe, Japan.
3. Department of Neurosurgery, Hyogo Prefectural Himeji Cardiovascular Center, Himeji, Japan.
4. Department of Neurosurgery, Hyogo Prefectural Kakogawa Medical Center, Kakogawa, Japan.
5. Department of Neurosurgery, Hyogo Prefectural Awaji Medical Center, Sumoto, Japan.
6. Department of Neurosurgery, Kita-harima Medical Center, Ono, Japan.
7. Department of Neurosurgery, Hirohata Steel Memorial Hospital, Himeji, Japan.
8. Department of Emergency and Critical Care Medicine, Hyogo Emergency Medical Center, Kobe, Japan.
9. Acute Care Medical Center, Hyogo Prefectural Kakogawa Medical Center, Kakogawa, Japan.