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Longer-term efficiency and safety of increasing the frequency of whole blood donation (INTERVAL): extension study of a randomised trial of 20 757 blood donors.
Kaptoge S, Di Angelantonio E, Moore C, Walker M, Armitage J, Ouwehand WH, Roberts DJ, Danesh J, Thompson SG; INTERVAL Trial Group. Kaptoge S, et al. Lancet Haematol. 2019 Oct;6(10):e510-e520. doi: 10.1016/S2352-3026(19)30106-1. Epub 2019 Aug 2. Lancet Haematol. 2019. PMID: 31383583 Free PMC article. Clinical Trial.