Williams, K, Modi, R N, Dymond, A, Hoare, S, Powell, A, Burt, J, Edwards, D, Lund, J, Johnson, R, Lobban, T, Lown, M, Sweeting, M J, Thom, H, Kaptoge, S, Fusco, F, Morris, S, Lip, G, Armstrong, N, Cowie, M R, Fitzmaurice, D A, Freedman, B, Griffin, S J, Sutton, S, Hobbs, FD R, McManus, R J, Mant, J & The SAFER Authorship Group 2022, ' Cluster randomised controlled trial of screening for atrial fibrillation in people aged 70 years and over to reduce stroke: protocol for the pilot study for the SAFER trial ', BMJ Open, vol. 12, no. 9, e065066 . https://doi.org/10.1136/bmjopen-2022-065066