Received: 28 March 2020
Revised: 2 November 2020
Accepted: 4 November 2020
First Online: 18 November 2020
Compliance with Ethical Standards
: This research was conducted with the approval of the Institutional Review Board of the Zhangjiakou Charity Hospital (Hebei, China).
: All participants signed an informed consent form.
: All authors agree the publication of this research.