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Lafayette TC, Coser VM, Br\u00fbl\u00e9 AO, Coser PL, Pereira WV. External auditory canal and middle ear relapse of acute promyelocytic leukemia treated with arsenic trioxide: case report and review of the literature. J Pediatr Hematol Oncol 32: 229-32, 2010.","DOI":"10.1097\/MPH.0b013e3181cf7ef3"},{"key":"13","doi-asserted-by":"crossref","unstructured":"13. Minoda S, Akasaka T, Okanoue Y, Honjo G, Nakagawa M, Ohno H. Relapse of acute promyelocytic leukemia in the external auditory canal confirmed by PML\/RARA dual-fusion and RARA break-apart fluorescence in situ hybridization. Ann Hematol 97: 909-911, 2018.","DOI":"10.1007\/s00277-018-3235-7"},{"key":"14","doi-asserted-by":"crossref","unstructured":"14. Ko BS, Tang JL, Chen YC, et al. Extramedullary relapse after all-trans retinoic acid treatment in acute promyelocytic leukemia--the occurrence of retinoic acid syndrome is a risk factor. Leukemia 13: 1406-8, 1999.","DOI":"10.1038\/sj.leu.2401495"},{"key":"15","unstructured":"15. 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