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Article History

Received: 23 June 2018

Accepted: 6 March 2019

First Online: 18 March 2019

Ethics approval and consent to participate

: Ethics approval was not deemed to be needed as this study uses data in the public domain and there is no interaction with patients nor animals.

: There were no individual’s person data requiring consent for publication.

: There were no financial and non-financial competing interests in this study.

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