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Article History

Received: 14 December 2024

Accepted: 1 July 2025

First Online: 8 July 2025

Change Date: 2 August 2025

Change Type: Update

Change Details: The original online version of this article was revised: The hyperlinks for the two supplementary files’ link were inadvertently interchanged.

Declarations

:

: Approval for this study was provided through the ethics approval process of the University of Otago (Category B, 21 September 2022).

: Not applicable (all leaders deceased with all data utilized being already published and in the public domain).

: Not applicable (all leaders deceased with all data utilized being already published and in the public domain).

: The authors declare no competing interests.