It has been noted that in the published version of this article 1, the explanatory text for the "#" symbol was inadvertently omitted from the footnotes. The footnote has now been updated to properly reflect the equal contributions of the authors. Specifically, the following text has been added to the correspondence and affiliation section: "# These authors contributed equally to this work." The original article can be found online at https://www.benthamscience.com/article/145918 The publisher apologizes for any inconvenience caused.
Jia et al. (Tue,) studied this question.