Article History
Received: 16 January 2020
Accepted: 2 March 2020
First Online: 16 March 2020
Conflict of interest
: The authors declare that they have no conflict of interest.
: All procedures performed in studies were in accordance with the ethical standards of Institutional Review Board of the First Affiliated Hospital of Chongqing Medical University and with the 1964 Helsinki Declaration and its later amendments.
: Informed consent was obtained from the participants.