I didn't see the show, but know that Gregg Allman had his transplant at Mayo Jacksonville. When I had my chemoembolization last week, one of the prep nurses mentioned that she was working on the transplant floor when he had it. She also said he must be doing okay, as he hasn't been back in the hospital since then.
I saw an indepth interview of Natalie Cole some months ago on Tavis Smiley's show. I believe the kidney disease was genetic. Her sister died from kidney failure just as Natalie was undergoing liver transplant. She does have hep C. I can't remember if she has been treated for it since transplant.
It's good that high-profile people are calling attention to the disease and educating the public.
Hugs,
Connie