Paul Knoepfler, a CIRM grantee at UC Davis, has a recent blog entry in his Stem Cell Myths series. The myth he debunks this time: Stem cell therapies are all transplants. As he so rightly points out, embryonic, iPS or tissue-specific stem cells can also be studied in the lab as a way of developing drugs that activate our own body's stem cell to heal the diseased organ or tissue. He writes: