1. Center for Cerebrovascular Research, and Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, California, and Department of Neurosurgery, Hua-Shan Hospital, Fu-Dan University, Shanghai, Peoples Republic of China (Zhu)
2. Center for Cerebrovascular Research, and Department of Neurological Surgery, University of California, San Francisco, San Francisco, California (Lawton, Du)
3. Department of Anesthesia and Perioperative Care, University of California, San Francisco, San Francisco, California (Shwe, Chen, Shen)
4. Center for Cerebrovascular Research, Departments of Anesthesia and Perioperative Care, Neurological Surgery, and Neurology, University of California, San Francisco, San Francisco, California (Young)
5. Center for Cerebrovascular Research, Departments of Anesthesia and Perioperative Care and Neurology, University of California, San Francisco, San Francisco, California (Yang)