We should do more to ensure health service workers are not unnecessarily tired. We know that errors occur more frequently when staff become tired. Recently, I read a worrying report by a Ms Hilary Coates at the department of health and science at the Royal College of Surgeons. She extrapolated figures from American statistics in a survey that considered clinical errors which led to patients' deaths. Ms Coates's figures indicated there could be as many as 90 Irish patient deaths due to clinical errors, the vast majority of which were made when staff were working overlong hours. We know, for example, that mistakes can be made in prescribing drugs. I cannot say whether Ms Coates's figures are correct, but they are worrying. Perhaps the Department of Health and Children could look into the report. The surveys quoted from America were carried out in Colorado and Utah. The report stated there was a 2.9% occurrence of error due to treatment, 53% of which were said to be preventable.