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Deletions affecting codons 557-558 of the c-KIT gene indicate a poor prognosis in patients with completely resected gastrointestinal stromal tumors: a study by the Spanish Group for Sarcoma Research (GEIS). J Clin Oncol 2005;23:6190-6198.","DOI":"10.1200\/JCO.2005.19.554"},{"key":"ref24","doi-asserted-by":"crossref","unstructured":"Ma Y, Cunningham ME, Wang X, Ghosh I, Regan L, Longley BJ. Inhibition of spontaneous receptor phosphorylation by residues in a putative alpha-helix in the KIT intracellular juxtamembrane region. J Biol Chem 1999;274:13399-13402.","DOI":"10.1074\/jbc.274.19.13399"},{"key":"ref25","doi-asserted-by":"crossref","unstructured":"Miettinen M, Lasota J. Gastrointestinal stromal tumors: pathology and prognosis at different sites. Semin Diagn Pathol 2006;23:70-83.","DOI":"10.1053\/j.semdp.2006.09.001"},{"key":"ref26","unstructured":"Antonescu CR, Sommer G, Sarran L, Tschernyavsky SJ, Riedel E, Woodruff JM, Robson M, Maki R, Brennan MF, Ladanyi M. 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