1. Department of Neuroendovascular Therapy, Yokohama Rosai Hospital, Yokohama, Kanagawa, Japan
2. Department of Neurosurgery, Yokohama Rosai Hospital, Yokohama, Kanagawa, Japan
3. Department of Neuroendovascular Therapy, Yokohama Municipal Citizen’s Hospital, Yokohama, Kanagawa, Japan