I heard Gregg Allman is not doing well ...does nybody have any updates ?

......he just cancelled his fall tour and is in the Mayo Clinic and that can not be good. I have / had tickets for his upcoming shows but what I am hearing is not all that positive. He is my LAST one ......I am been seeing him and following him for 40 years now.   
I think all they're saying for now is "serious health problems" I know he had a liver transplant a few years ago, it might be related to that.