1 Cerebrovascular Laboratory, Department of Neurosurgery, Columbia University Medical Center, 630 West 168th Street, New York, NY 10032, USA.
2 Cerebrovascular Laboratory, Department of Neurosurgery, Columbia University Medical Center, 630 West 168th Street, New York, NY 10032, USA. Electronic address: ga@neuro-digital.com.
3 Department of Radiation Oncology, Dana-Farber Cancer Institute, Brigham and Women's Hospital, MA, USA.
4 Cerebrovascular Laboratory, Department of Neurosurgery, Columbia University Medical Center, 630 West 168th Street, New York, NY 10032, USA; Neuro-Intensive Care Unit, Columbia University Medical Center, New York, NY, USA.