Are the ACT stem cell claims unjustified?

In "Row Over New Stem Cell Claims," Stewart Patterson writes that claims of ACT scientists have been greeted by skepticism among UK scientists.

The ACT team, led by Dr Robert Lanza, stated: "The ability to create new stem cell lines and therapies without destroying embryos would address the ethical concerns of many, and allow the generation of matched tissue for children and siblings born from transferred PGD (pre-implantation genetic diagnosis) embryos."

PGD has been used in IVF for years.

Ian Wilmut said: "the authors make unjustified claims for their techniques."