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Handling editor Tahir S Pillay.
Contributors PJT was invited to provide the commentary and conceived the original idea. After discussion with PJT, MK further developed the idea and drafted the first version of the manuscript with subsequent input from all the authors. All authors provided critical feedback and helped shape the analysis and contributed to the development of each version of the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Commissioned; internally peer reviewed.