Wishing Paul all the best. Sounds like he is getting the best of what is out there from his team. Seems like MSC's offer great promise and optimistic that's the case here, if you are so inclined you can read about what these cells do. Best of all there's evidence to back up its tissue regenerative capabilities.:
http://www.ncbi.nlm.nih.gov/pubmed/19602034
I have been watching your posts & following his blog because my diagnosis and category matches Paul's.
My docs want me to walk the same street as Paul's and when I had my physical I got the same call from my doc
and my response was the same as Paul's. I ask myself the same "is it worth it questions". When they throw the word cure in there and you look at the alternatives its hard to say no. Take care of yourself. Its often harder on the caregiver than it is on the patient.
Godspeed!