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Article History

Received: 25 April 2020

Accepted: 28 March 2022

First Online: 4 May 2022

Declarations

:

: We confirm that we have followed the guidelines on the Journal’s “Ethical responsibilities of authors” page ().We also confirm that we have followed the requirements on the Journal’s “Ethics & disclosures” page ().Finally, we confirm that we adhere to all the requirements of the COPE guidance ().

: We have not conducted any research with human beings; we have not carried out empirical studies; and we have not gathered any data. Hence, as per Springer’s guidelines on informed consent (), this paper does not require informed consent from anybody for publication.

: We confirm that we have no conflict of interest.