Funding for this research was provided by:
the General Programs of Beijing Municipal Science and Technology Commission (Z171100001017079)
Received: 27 March 2020
Accepted: 28 July 2020
First Online: 8 August 2020
Ethics approval and consent to participate
: The institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The study design was approved by the Institutional Ethics Committee at Beijing Tongren Hospital (Grant number: Z171100001017079).
: All study subjects provided informed consent and approved to publish.
: The authors declare that they have no competing interests.