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Stem cells were a little-known area of research then, but one gathering pace. Here was a blank-template cell with the potential, given the know-how, to become any other type of cell in the body. The year before, in 1997, the first regenerative cell-therapy had been given the go ahead, where stem cells were used to regrow cartilage in the knee. Later in 1998, the first human embryonic stem cells were isolated. Sefton's forecast seemed justified.
Fifteen years on, however, we've had some liver cells, eye cells, even a...