The COMPARE study is recruiting at several locations in England visited by ten mobile donation teams.
If you attend a blood donation session involved with the study, you will be asked before your blood donation whether you are interested in taking part or not.
If you would like to join the study, then all you need to do is let your donor carer know. You will be given an information leaflet to read and your donor carer will take you through the consent form and answer any questions you might have.