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. 2019 Oct 28;20:388. doi: 10.1186/s12882-019-1529-1
• While abroad did you have any blood transfusions?
• While abroad did you have any surgery or dental treatment?
• While abroad were you ill, requiring hospital admission?
• Were any needles, dialysis lines or dialysers shared between you or any other patients?
• Do you undertake any high risk sexual activity?
• Do you inject any intravenous drugs into yourself?