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XQ and ZL contributed equally.
Contributors CY and ZL offered administrative and material support and obtained funding; XQ, CY and ZL designed the study; XQ and HL drafted and revised the manuscript; CL, CX and JD acquired the data; JH, YZ, FZ and YZha analysed data; MX, SX and WX interpreted the results. They all participated sufficiently in the work and all approved the final version of the article.
Competing interests None.
Patient consent Obtained.
Ethics approval Ethics committees of Tongji Hospital of Tongji University, Shanghai, China and 302 Hospital of Chinese People's Liberation Army, Beijing, China.
Provenance and peer review Not commissioned; externally peer reviewed.
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