**Author details**

Pei Huang1,2 and Hongzhang Deng1,2,3\*

1 Engineering Research Center of Molecular and Neuro-Imaging, Ministry of Education, School of Life Science and Technology, Xidian University, Xi'an, Shaanxi, P.R. China

2 Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an, Shaanxi, P.R. China

3 National Institutes of Health, Tianjin University, Tianjin, China

\*Address all correspondence to: dhz1989@163.com

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