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Q-NW, R-MY and X-YB contributed equally.
Correction notice This article has been corrected since it appeared Online First. Author affiliations have been corrected.
Contributors Q-NW did the paper writing. R-MY helped in paper writing and data collection. Z-XZ was involved in experimental operation. X-PW helped in statistical analysis. QZ helped in data collection. D-SL helped in surgical procedures. X-YB was involved in surgical procedures and statistical analysis. LD helped in experimental design and surgical procedures.
Funding This study was supported by grant from the National Natural Science Foundation of China (Grant No. 81571136).
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.