Caution urged in new method for stem cells - Harvard sticks to cloning

The stem cell wars are not over, say leading researchers at Harvard and other universities who believe that the cloning of human embryos still represents the key to developing effective treatments for an array of horrific diseases.

Recent weeks have seen spectacular breakthroughs in creating embryonic-like stem cells without making or destroying human embryos. Politicians, including President Bush, together with religious activists and some highly visible biologists have been quick to proclaim that the new technique for genetically "reprogramming" ordinary adult skin tissue into stem cells marks the moral high road to the future.

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