1. Department of Neurology; St Marianna University School of Medicine; Kawasaki Japan
2. Department of Neurosurgery; Kawasaki Saiwai Hospital; Kawasaki Japan
3. Department of Neurosurgery; Toyama Red Cross Hospital; Toyama Japan
4. Stroke Center; St Marianna University Toyoko Hospital; Kawasaki Japan
5. Department of Neurosurgery; Ohta General Hospital; Kawasaki Japan
6. Department of Neurosurgery; Kanto Rosai Hospital; Kawasaki Japan
7. Department of Neurology; Kawasaki City Hospital; Kawasaki Japan
8. Department of Neurosurgery; Asao General Hospital; Kawasaki Japan
9. Department of Neurosurgery; Teikyo University School of Medicine; University Hospital Mizonokuchi; Kawasaki Japan
10. Department of Neurosurgery; Municipal Tama Hospital; Kawasaki Japan
11. Department of Neurosurgery; Nippon Medical School Musashikosugi Hospital; Kawasaki Japan
12. Department of Neurosurgery; Daiichi Hospital; Kawasaki Japan
13. Department of Neurosurgery; Shinyurigaoka General Hospital; Kawasaki Japan