1 Retraction note

The Editors-in-Chief have retracted this article [1] because it shows significant overlap with an article by different authors that was under consideration at the same time at a different journal [2]. Additionally, this article shows evidence of authorship manipulation. The identity of the second author could not be verified: Jagiellonian University confirmed that Yadong Liao has not been affiliated to this institution.

Junguo Shi has agreed to this retraction but not to the wording of the retraction notice. Yadong Liao has not responded to correspondence regarding this retraction.