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It helps ASCEND produce reliable results if we are able to follow up with as many participants as possible by accessing their electronic NHS records. If you decide you do not want your study data to be linked in this way you can withdraw without affecting your current medical care. This can be done by contacting the study team who will require identification in order to inform NHS Digital and other data sources that you no longer wish to be included. You are free to do this at any time and do not have to give us a reason. If you have any questions, please contact the study team using the following details: