Funding for this research was provided by:
Clinical Research Fund of Qiqihar Medical Academy (QMSI2019L-14)
Received: 11 June 2020
Accepted: 30 August 2020
First Online: 3 September 2020
Ethics approval and consent to participate
: The study protocol was approved by the Regional Ethics Committee for Clinical Research of the Second Affiliated Hospital of Qiqihar Medical College (Qiqihar, 161006, China). All patients have signed informed consent.
: Not applicable.
: The authors have declared that no competing interests exist.