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Smith JL, Ritchie J, Rettie T.Smith JL, et al. Among authors: ritchie j.Br Med J. 1915 Nov 13;2(2863):716. doi: 10.1136/bmj.2.2863.716.Br Med J. 1915.PMID: 20767891Free PMC article.No abstract available.
Smith JL, Ritchie J, Rettie T.Smith JL, et al. Among authors: ritchie j.Br Med J. 1917 Sep 22;2(2960):386-7. doi: 10.1136/bmj.2.2960.386.Br Med J. 1917.PMID: 20768742Free PMC article.No abstract available.
Walker N, Ritchie J.Walker N, et al. Among authors: ritchie j.Br Med J. 1911 Jul 1;2(2635):1-5. doi: 10.1136/bmj.2.2635.1.Br Med J. 1911.PMID: 20765700Free PMC article.No abstract available.
Ritchie J, Walker N.Ritchie J, et al.Br Med J. 1895 Jan 19;1(1777):149. doi: 10.1136/bmj.1.1777.149.Br Med J. 1895.PMID: 20755278Free PMC article.No abstract available.
Ritchie J.Ritchie J.Br Med J. 1937 Jul 24;2(3994):160-3. doi: 10.1136/bmj.2.3994.160.Br Med J. 1937.PMID: 20780800Free PMC article.No abstract available.
Scott MJ, McClure G, Reid MM, Ritchie JN, Keilty SR.Scott MJ, et al. Among authors: ritchie jn.Br Med J. 1978 Oct 7;2(6143):987-9. doi: 10.1136/bmj.2.6143.987.Br Med J. 1978.PMID: 709203Free PMC article.