[1]: http://www.asma.org/asma/media/asma/Travel-Publications/Cabi...
[2]: https://publications.parliament.uk/pa/ld199900/ldselect/ldsc...
Edit: The "evidence" on that page is the existence of pilots who died prematurely of heart conditions and suicides, an anonymous letter scanned from a self-published book, a conveniently unavailable video, a bunch of slides without citations, the presumption that a lack of official information about a supposed previous event (which has all the same hallmarks of non-proof) is proof of a nefarious conspiracy, and a death report that mentions acute myocardial infarction and lethal levels of opioids from which we're somehow supposed to conclude that the actual cause of death was an airborne neurotoxin inhaled 50 days before.