1. Department of Physiology and Pharmacology; Loma Linda University; Loma Linda CA
2. Department of Neurosurgery; Second Affiliated Hospital, School of Medicine, Zhejiang University; Zhejiang China
3. Department of Neurosurgery; Southwest Hospital, Third Millitary Medical University; Chongqing China
4. Department of Anesthesiology; Loma Linda Medical Center; Loma Linda CA
5. Department of Neurosurgery; Loma Linda Medical Center; Loma Linda CA