He used to be in charge at Geron and helped fund the research which led to first human embryonic stem cell line being created in 1998 and now heads another company, BioTime.

BBC: White House stem cell shift expected

The other thing it does is it makes it extremely easy now to tailor a stem cell to an individual because all I have to do is get a few skin cells from you and then put in these magic factors, and suddenly I've got an embryonic stem cell line that's tailor made directly to you.

NPR: Scientists Create Embryonic Stem Cells from Skin

But in the first experiment we got a blastocyst and within a couple of months we already had an (embryonic) stem cell line.

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