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Paediatric cardiac surgical mortality after Bristol

EDITOR—The lack of accuracy of the hospital episode statistics used by Aylin et al to analyse the paediatric cardiac surgical mortality in England after Bristol is worrying.1 Indeed, Aylin's group reported that hospital episode statistics “manifestly contain errors” and that their available data sources “have such clear limitations that one could ask whether any reliable conclusions can be drawn.”2 We have also shown hospital episode statistics data …