I can't vote cause I really don't know, I can't guess. Not for moral reasons but because for me that is a mystery. It can be a combination of how you had live, with genetics.
I have a couple of uncles that were very healthy, never smoked, never saw them drunk, but didn't reach 80.
Instead my godfather used to be a heavy smoker, my mother called him the chimney; he also suffer narcolepsy, but today he is 87 and looks fine.
So who knows.
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