Received: 22 April 2020
Accepted: 30 April 2020
First Online: 13 May 2020
Change Date: 30 October 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
Ethics approval and consent to participate
: There was no ethics approval necessary because this is a review of the literature.
: All authors gave consent for the publication.
: The authors declare that they have no competing interests.