About the Authors

Li Zhaoping

To whom correspondence should be addressed. E-mail: z.li@ucl.ac.uk

Affiliation Department of Computer Science, University College London, United Kingdom

Li Jingling

Affiliation Graduate Institute of Neural and Cognitive Sciences, China Medical University, Taiwan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

LZ conceived and designed the experiments, built the model, and wrote the paper. LJ performed the experiments. LZ and LJ analyzed the data.