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Great Ormond Street Hospital (informally GOSH or Great Ormond Street, formerly the Hospital for Sick Children) is a children's hospital located in the Bloomsbury area of the London Borough of Camden, and a part of Great Ormond Street Hospital for Children NHS Foundation Trust.
The hospital is the largest centre for child heart surgery in the UK and one of the largest centres for heart transplantation in the world. In 1962 they developed the first heart and lung bypass machine for children. With children's book author Roald Dahl, they developed an improved shunt valve for children with hydrocephalus, and non-invasive (percutaneous) heart valve replacements. They did the first UK clinical trials of the rubella vaccine, and the first bone marrow transplant and gene therapy for severe combined immunodeficiency.The hospital is the largest centre for research and postgraduate teaching in children's health in Europe.In 1929, J. M. Barrie donated the copyright to Peter Pan to the hospital.