No doubt, true. My dad has stage 5 kidney disease and is on dialysis.
Let me transfer my condolences for your father which I had inadvertently posted to Martin. You may not have yet seen them.
To wit:
I'm truly sad to hear about your father, John. My condolences.
My dad v dad thing was actually what us kids used to chirp at each other. In a kind of nyah-nyah, schoolyard sense. In my dad's case it was true, as he was 6'5" with arms the size of Oak trees... a veritable Paul Bunyon.
My dad died in 1998. Had he never smoked, he might have lived a few years longer, or at least healthier.