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The professor developed the treatment with Dr John Dingley, consultant anaesthetist at Swansea University's School of Medicine.
BBC: Cooling gas to help save babies in Bristol
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Scientists have developed a treatment for the liver disease Hepatitis C that may be far more effective than current drugs.
BBC: Better treatment for Hepatitis C
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She sais that without the screening there was a chance that she would have later developed symptoms, had treatment and had the same outlook as she has now - but without the screening she might never have developed symptoms and so avoided treatment and unnecessary anxiety.
BBC: Breast screening: For and against