1. From the Departments of Anesthesiology and Physiology, Loma Linda University School of Medicine, CA (Z.G., Q.H., L.X., Z.-N.G., Y.O., Y.H., C.Y., J.T., J.H.Z.); and Department of Neurosurgery, the 1st Affiliated Hospital of Chongqing Medical University, Chongqing, China (Z.G., X.S.).