Well, in theory... I have some liver involvement in my Epstein Barr chronic syndrome. My liver literally swells enough for me to notice it. There has to be damage involved there. I'm not sure whether stem cells can turn into hepatocytes but if so it could help.This is very interesting.
I imagine stem cells would be good for a lot of diseases and conditions but also would be far too expensive to implement on a wider scale. Not sure how it would help with something like CFS/ME though.