This is worth reading.
https://royalsociety.org/blog/2021/...N2it9jSUqkbfzT66CL84Iiewcv8aAjI9EALw_wcB

It seems clear that whilst we recognise its existence the underlying mechanisms are not properly understood and as yet there is no recognised therapy/treatment.

Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...