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Ekfors TO, Aho HJ, Kekomäki M.Ekfors TO, et al.Virchows Arch A Pathol Anat Histopathol. 1985;406(3):381-8. doi: 10.1007/BF00704307.Virchows Arch A Pathol Anat Histopathol. 1985.PMID: 3923713