Thank you NC for your post. Your knowledge and emergency experience is valued.
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I believe I heard in the 80's that autopsies on RAF fast-jet 'fatals' where the accident was due to 'other causes' showed marked coronary artery disease in most of the pilots, nearly all aged between 25 and 35.
BOAC...Not only confined to the RAF unfortunately. You've potentially opened a can of worms with that post.