1. Neuroscience Research Institute, Second Military Medical University (J.Q., S.-J.L., Y.-z.C.); Chinese Academy of Sciences, Shanghai 200433, China
2. Key Laboratory of Neurobiology, Shanghai Institute of Physiology (J.Q.), Chinese Academy of Sciences, Shanghai 200433, China
3. Shanghai Institute of Cell Biology (L.-g.L., G.P.), Chinese Academy of Sciences, Shanghai 200433, China
4. Beijing Institute of Developmental Biology (X.-y.H.), Chinese Academy of Sciences, Shanghai 200433, China