Received: 27 August 2019
Accepted: 20 January 2020
First Online: 30 January 2020
Change Date: 9 April 2021
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1186/S41039-021-00154-Y
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: This is a conceptual paper which did not involve any empirical study. Therefore, no ethical approval and consent to participate is required.
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: The authors declare that they have no competing interests.