Funding for this research was provided by:
National Key Research and Development Project of China (2017YFC0907402)
Article History
Received: 7 May 2019
Accepted: 7 January 2020
First Online: 13 January 2020
Compliance with ethical standards
:
: This study did not involve any human or animal data and was qualified as negligible risk research and exempt from the ethical review of the Human Research Ethics Committee of the Shengjing Hospital of China Medical University; no consent was required.
: The authors declare that they have no competing interests.