Stem cell clinics in other places than the US have been doing this sort of thing for individuals for quite a while, haven’t they?
I believe they have been using other sources of adult stem cells, e.g. Wayne Newton. But I think this is the first published study using a control group, not a case report, using cardiomyocyte progenitors taken by biopsy and subsequently cultured and isolated, or vice versa, before being infused back into the same patients.