Funding for this research was provided by:
National Natural Science Foundation of China (81173250)
Article History
Received: 3 March 2020
Accepted: 21 May 2020
First Online: 29 May 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee of Linyi People’s Hospital Affiliated to Shandong University and was performed in accordance with the guidelines and regulations. Informed written consent was obtained from the all patients.
: Not applicable.
: The authors declare that there is no competing interests regarding the publication of this paper.