1. State Key Laboratory of Cognitive Neuroscience and Learning & IDG/McGovern Institute for Brain Research,
2. Center for Collaboration and Innovation in Brain and Learning Sciences, Beijing Normal University, Beijing 100875, China,
3. Department of Psychology, Renmin University of China, Beijing 100872, China,
4. Molecular Neuroscience Department, and
5. Department of Psychology, George Mason University, Fairfax, VA 22030, USA