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Avery, A J, Sheehan, C, Bell, B, Armstrong, S, Ashcroft, D M, Boyd, M J, Chuter, A, Cooper, A, Donnelly, A, Edwards, A, Evans, H P, Hellard, S, Lymn, J, Mehta, R, Rodgers, S, Sheikh, A, Smith, P, Williams, H, Campbell, S M & Carson-Stevens, A 2020, ' Incidence, nature and causes of avoidable significant harm in primary care in England : retrospective case note review ', BMJ Quality & Safety . https://doi.org/10.1136/bmjqs-2020-011405 BASE-Bielefeld Academic Search Engine Avery, A J, Sheehan, C, Bell, B, Armstrong, S, Ashcroft, D M, Boyd, M J, Chuter, A, Cooper, A, Donnelly, A, Edwards, A, Evans, H P, Hellard, S, Lymn, J, Mehta, R, Rodgers, S, Sheikh, A, Smith, P, Williams, H, Campbell, S M & Carson-stevens, A 2020, ' Incidence, nature and causes of avoidable significant harm in primary care in England: retrospective case note review ', BMJ Quality and Safety, pp. bmjqs-2020-011405 . https://doi.org/10.1136/bmjqs-2020-011405 BMJ Quality & Safety Antony Chuter