The 39-year-old remains in a critical condition at St George's Hospital in Tooting, south London.

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But Catherine Collins, principal dietician at St George's Hospital in London, maintained the campaign would do some good.

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Mr Grills was taken by ambulance to St George's Hospital in south London.

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She helps to support the families of very sick children in paediatric intensive care at St George's Hospital in London.

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Professor Stuart Campbell, head of obstetrics and gynaecology at St George's Hospital Medical School, has pioneered the 4-D ultrasound scanning.

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Relatives are at her bedside at St George's Hospital in Tooting, south London, where her mother, Professor Sheila Hollins, also works.

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Mr Grills was taken by ambulance to St George's Hospital in Tooting, south London, where he is in a critical condition.

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Professor Stuart Campbell, of St George's Hospital Medical School who has been testing the treatment, said it was a "most exciting" development.

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Professor John Hermon-Taylor, head of surgery at St George's Hospital in London, believes the bacterium can be linked to both Crohn's disease and an almost identical condition in cattle.

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