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Edwards PJ, Bennett-Britton I, Ridd MJ, Booker M, Barnes RK.Edwards PJ, et al. Among authors: booker m.Br J Gen Pract. 2021 Oct 28;71(712):e869-e876. doi: 10.3399/BJGP.2021.0195. Print 2021 Nov.Br J Gen Pract. 2021.PMID: 34489251Free PMC article.