No funding or sponsorship was received for this study or publication of this article.
All named authors meet the International Committee of Medical Journal Editors (ICMJE) criteria for authorship for this article, take responsibility for the integrity of the work as a whole, and have given their approval for this version to be published.
All authors carefully read the manuscript by Wang et al., and reviewed their methods and data. Nong He suggested comment points and drafted the manuscript. Fu-Shan Xue and Cheng-Wen Li revised the comment points and manuscript. All authors have read and approved the final manuscript.
Nong He, Fu-Shan Xue and Cheng-Wen Li declare that they have no conflict of interest for this work.
Compliance with Ethics Guidelines
This article is based on a previously conducted study and does not contain any study with human participants or animals performed by any of the authors.
Data sharing is not applicable to this article as no datasets were generated or analyzed during the current study.