In this article, the authors omitted a statement in their article regarding ethical approval number for the research presented in this publication (Section 2.1), which is required under the policies of the journal. The authors confirm that ethical approval was obtained from the ethics committee of the First Affiliated Hospital of Shantou University Medical College for the research under the following reference number: B-2020-174.
The original version can be found below.
2.1. Study design and subjects
…… The study was approved by the ethics committee of the First Affiliated Hospital of Shantou University Medical College, and all participants provided written informed consent.
The approval number has been added into the statement.
The correct version of ethical approval statement should be as below.
2.1. Study design and subjects
…… The study was approved by the ethics committee of the First Affiliated Hospital of Shantou University Medical College under the following reference number: B-2020-174, and all participants provided written informed consent.
The authors apologize for the errors.
Declaration of competing interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.