1. James P. Livington Professor and Vice-chair, Department of Anesthesia and Perioperative Care, Professor of Neurological Surgery and Neurology, and the Center for Cerebrovascular Research.
2. Assistant Professor, Department of Neurological Surgery and the Center for Cerebrovascular Research.
3. Assistant Professor, Department of Anesthesia and Perioperative Care and the Center for Cerebrovascular Research.
4. Investigator, Center for Cerebrovascular Research, University of California, San Francisco, San Francisco, California.