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Very interesting. The author of the paper is around, at least according to the internet, at 90+ years of age and still practising physiotherapy.

And is also totally blind! [1] Which must have made taking these observations much harder.

Also thought that but the article is dated 2000.

Yes, but there is a report of him being around around 2022 also - https://web.archive.org/web/20220128114020/https://whyy.org/...