How reliable is this report?
I consider it unlikely that the Pak army is treating Osama, because that would be dangerous for Musharef if he knows about it, and for the generals if he does not. They know we would take such a thing as a hostile act, and if caught with Osama, they would have to hand him over, and they don't want to do that and inflame their masses. So, they would not be likely to have Osama in a hospital getting dialysis. But, the report is credible, so it merits further investigation.