Updates are available Expression of concern dated 2020-06-25
Click to view Expression of concern: https://doi.org/10.1186/s12890-019-0956-x
Retraction Retraction dated 2020-12-10
Click to view Retraction: https://doi.org/10.1186/s12890-020-01365-7
Retraction Retraction dated 2020-12-10
Click to view Retraction: https://doi.org/10.1186/s12890-020-01365-7
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Authors
Zhang, Chuncheng
Yue, Jing
Li, Mingyue
Jiang, Wei
Pan, Yu
Song, Zhimin
Shi, Cailian
Fan, Weixuan
Pan, Zhenxiang
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More Information
Article History
Received: 9 October 2019
Accepted: 10 October 2019
First Online: 9 November 2019
Change Date: 25 June 2020
Change Type: Clarification
Change Details: Editor’s Note: This article is currently under investigation due to concerns about discrepancies between the article and the associated clinical trial registration (ChiCTR1900024250). Appropriate editorial action will be taken once this matter is resolved.
Change Date: 10 December 2020
Change Type: Correction
Change Details: This article has been retracted. Please see the Retraction Notice for more detail: https://doi.org/10.1186/s12890-020-01365-7.
Ethics approval and consent to participate
: This study was approved by The Second Hospital of Jilin University and Yanbian University. Informed written consent was obtained from all participants and their relatives.
: Not applicable.
: The authors declare that they have no competing interests.
