The Editor-in-Chief and the publisher have retracted this article. This article was submitted to be part of a guest-edited issue. An investigation concluded that the editorial process of this guest-edited issue was compromised by a third party and that the peer review process has been manipulated. Based on the investigation's findings the Editor-in-Chief therefore no longer has confidence in the results and conclusions of this article.

Mehedi Masud disagrees with this retraction. Parminder Singh has not explicitly stated whether they agree with this retraction. Ajan Ahmed and Mohammad Monirujjaman Khan have not responded to correspondence regarding this retraction. The Publisher has not been able to obtain a current email address for author Ranbir Singh Batth.

The online version of this article contains the full text of the retracted article as Supplementary Information.