And I can argue that you are being far too optimistic here. It's a good proof of concept paper for potential advances in kidney transplantation, but to sell it as a proof of concept for cryonics is ridiculous.There's a reason it's published in a fairly low-impact journal and not cited very frequently; this is not some groundbreaking "brilliant" trial. It's an isolated proof of concept that shows something is possible, and only if you're willing to be tolerant of multiple trails and a frankly imperfectly preserved kidney. It suggests with enough research one day we may be able to find a cooling solution that can preserve ENOUGH of the human kidney to transplant it to another living donor. You can not casually compare a kidney to a brain in terms of complexity and feasibility for preservation. They are very different organs, with very different needs and one is far, far less tolerant of injury.