Reader Comments

Post a new comment on this article

Editorial Note

Posted by PLOS_ONE_Group on 27 May 2021 at 22:27 GMT

The authors have stated that the incorrect ethics committee approval form was provided in error as S3 File of this article. The published S3 File is an approval form for a later intervention study, rather than the baseline survey reported in this article. The PLOS ONE Editors have viewed the ethics approval document for the baseline survey provided by the authors, dated 10 April, 2017. The review process was also verified by Shandong University Cheeloo College of Medicine.

No competing interests declared.