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I am not able to read the article, so this comment might be a little off topic - but, I hope it is relevant.
My father died of congestive heart failure in 1997, and the period between diagnosis and death was almost exactly 18 months: I think, from memory, that this was a very close fit to the statistics. After my mother's more recent death in 2008, I exchanged many e-mails about end-of-life with Tessa Ing, when she was head of an end-of-life care section within the Department of Health. One thing which Tessa told me, so it must have 'concerned' her, was that people viewed a cancer diagnosis 'as terminal' but for some reason this did not seem to be as true for a diagnosis of heart failure: the peculiarity, as Tessa pointed out, is that typically patients diagnosed with heart failure would die much more quickly than many patients diagnosed with cancer [even if the cancer did kill them].
End-of-Life/Palliative care, does seem to have originated with cancer - and it is, it seems to me, still nothing like as 'well established and well organised' for patients with other illnesses which will kill them. I suspect the worst situation, is the 'dying from old age and progressive frailty' situation, when joined-up EoL/Palliative Care is more challenging.