1. Institute of Neuroscience and State Key Laboratory of Neuroscience, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, P. R. China.
2. Graduate School of Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai 200031, P. R. China.
3. The Scripps Research Institute, Department of Molecular and Cellular Neurobiology, La Jolla, CA 92037, USA.
4. Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11724, USA.
5. University of California at San Diego, La Jolla, CA, 92093, USA.