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Acknowledgements
The author would like to thank Dr Alessandro Guidotti for his ongoing dialog regarding this hypothesis. This editorial is dedicated to the memory of my mentor and colleague, Dr Erminio Costa, who passed away 28 November 2009.
Financial & competing interests disclosure
The author has no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.
No writing assistance was utilized in the production of this manuscript.