Funding for this research was provided by:
the National Natural Science Foundation of China (81670566)
Natural Science Foundation of Jiangsu Province (ZDRCA2016066)
Jiangsu Provincial Key Research and Development Program (ZDRCA2016066)
International Union for Vacuum Science, Technique, and Applications (QRX17129)
Postdoctoral Science Foundation of Jiangsu Province (2018M642222)
Received: 28 July 2020
Accepted: 2 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: This study was carried out in strict accordance with the recommendations in the Guide for the Care and Use of Laboratory Animals of the National Institutes of Health. The protocol was approved by the Committee on the Ethics of Animal Experiments of the Nanjing Drum Tower Hospital (Approval No. 20160601).
: This manuscript is approved by all authors for publication. I would like to declare on behalf of my co-authors that the work described was original research that has not been published previously, and not under consideration for publication elsewhere, in whole or in part. The materials in this manuscript are not reproduced from other articles. All the authors listed have approved the manuscript that is enclosed.
: The authors declare that they have no conflict of interest.