Funding for this research was provided by:
National Natural Science Foundation of China (81271489)
Hebei Province Natural Science Foundation of China (H20142062)
Government-funded Program for Training Excellent Clinical Medical Talents and Fundamental Research (LS201612)
Received: 27 May 2020
Accepted: 26 October 2020
First Online: 10 November 2020
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committee of the First Hospital of Hebei Medical University. Informed consent was obtained from all the study subjects before enrollment.
: Not applicable.
: The authors declare that they have no competing interests.