Abstract
IOP Publishing Limited ("IOPP") is retracting this paper following an investigation which resulted from a reader complaint. The paper makes a number of unsubstantiated claims and, in the opinion of IOPP, lacks scientific rigour, clarity and objectivity. Although the paper was subject to peer review via the conference organisers, unfortunately these issues were not identified on this occasion. IOPP also has concerns regarding the discriminatory tone and sentiment of the paper, which are not appropriate in a scientific journal.
IOPP expresses its thanks to the readers and independent advisors who have shared their thoughts regarding this paper during the course of the investigation.
Retraction published: 25 June 2021
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