AUTHOR CONTRIBUTIONS
Wei Zheng and Xiqi Zhu designed the study. Wei Zheng, Xiaoyan Qin, Ronghua Mu, and Xiaoyan Qin conducted the MRI data processing and statistical analyses. Wei Zheng, Ronghua Mu, Xin Li, JL, PY and Fuzhen Liu contributed to data collection and analyses. Wei Zheng and Ronghua Mu wrote the paper. Xiqi Zhu and Wei Zheng critically revised the manuscript. All authors approved the final draft.