A year ago my brother-in-law, Paul, was given at most two years to live. He was diagnosed with leukaemia. He has just been told officially by his doctor that he is now in remission and, if all continues smoothly as expected, he will be cured.

Why the difference? It has all to do with stem cells, which up until then, I must admit, had been for me just something remote which some people somewhere else were arguing over.

 
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