PilotsDaughter
As no one in the know has responded just an opinion.
We live in a liability society where we like to lay the blame where we can get the best return.
That may sound harsh but its understandable and I can well understand your motivation.
There are many illnesses where there is no proof that an occupation has caused it but enough publicity and a new fangled name has got a result.
That maybe your best route.
Pace