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Kingdon EJ, Holt SG, Burns A.Kingdon EJ, et al.Postgrad Med J. 2002 Dec;78(926):759. doi: 10.1136/pmj.78.926.759.Postgrad Med J. 2002.PMID: 12509698Free PMC article.No abstract available.
Das P, Vivek V, Ford M, Kingdon E, Holt S.Das P, et al.BMJ Case Rep. 2011 Aug 31;2011:bcr0520114287. doi: 10.1136/bcr.05.2011.4287.BMJ Case Rep. 2011.PMID: 22679045Free PMC article.