1. Solomon H. Snyder Department of Neuroscience, Center for Sensory Biology, Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA.
2. Nanjing University of Chinese Medicine, 138 Xianlin Road, Nanjing 210046, China.
3. Inner Mongolia University for the Nationalities, School of Life Science, 22 Huolinhe Street, Tongliao City 028043, China.
4. Department of Dermatology, University of California, San Francisco, CA 94143, USA.
5. Department of Surgery, University of California, San Francisco, CA 94143, USA.
6. Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.