Funding for this research was provided by:
National Natural Science Foundation of China (81972283, 81772596)
Received: 21 April 2020
Accepted: 11 August 2020
First Online: 25 September 2020
Ethics approval and consent to participate
: This study was approved by the participating institutional ethics review boards (Fourth Hospital of Huai’an, First Affiliated Hospital of Anhui University of Chinese Medicine, Beijing Youan Hospital and Hepatobiliary Disease Hospital of Jilin Province), and the requirement for written informed consent was waived.
: Not applicable.
: The authors declare that they have no competing interests.