Li, Tan
Li, Guangxiao
Guo, Xiaofan
Li, Zhao
Sun, Yingxian
Article History
Received: 9 March 2021
Accepted: 7 May 2021
First Online: 12 May 2021
Declarations
:
: The study was approved by the Ethics Committee of China Medical University (Shenyang, China) and was according to the Declaration of Helsinki. All methods were performed in accordance with the relevant guidelines and regulations. Written informed consent was obtained from each participant. The decease patients are not involved in the study.
: Not applicable.
: The authors declare that they have no conflicts of interest.