Some meta - analyses have concluded that bone marrow cells provide modest benefits in terms of heart function; critics have argued it doesn't actually do much good. (emoryhealthsciblog.com)
As the authors point out, 49 dogs are a small number - perhaps too small to note modest benefits of ACE treatment. (2ndchance.info)
So far, at least, there are only modest benefits associated with biotechnology products, and it has yet to be shown that the benefits outweigh the risks. (scientificamerican.com)