Xuesi M Shao1, Zhuang T Fang2. 1. Department of Neurobiology, David Geffen School of Medicine at University of California, Los Angeles, CA; Department of Internal Medicine, Charles R. Drew University of Medicine and Science, Los Angeles, CA. Electronic address: mshao@g.ucla.edu. 2. Department of Anesthesiology, David Geffen School of Medicine at University of California, Los Angeles, CA.