Received: 25 May 2021
Accepted: 12 January 2022
First Online: 28 January 2022
Change Date: 19 May 2022
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/S12891-022-05303-Y
: The whole process of this study was carried out under the requirements of the Helsinki Declaration. The reporting of this study followed the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) reporting guideline for observational studies.This study was conducted as approved by the institutional review board of Tianjin University of Sport, Tianjin, China (approval number TJUS2017015). All participants and their guardians understood the purpose and method of this study.
: Not applicable.
: The authors declare that they have no competing interests.