Funding for this research was provided by:
National Natural Science Foundation of China (81870312)
Received: 3 January 2020
Accepted: 5 July 2020
First Online: 11 July 2020
Ethics approval and consent to participate
: We have achieved the approval from the Ethics Committee of Kailuan General Hospital, and the written informed consents signed by all individuals in the observation group.
: Not applicable.
: The author state that there is no interest conflict in this study.