I don't think the big C can be attributed to working for Bristow, I retired after 50 years in aviation, of which 12 years were with Bristow.
Sadly I have had my left kidney removed due to the big C.
My Anesthetist friend says he is not surprised and attributes it to my old profession, where more or less all oils, fuels, solvents, paints and carbon brakes etc. are carcinogenic and us macho men never used protective gloves, did we?
Tony