Malignant gastrointestinal stromal tumor of the ampulla of Vater: a case report

Korean J Gastroenterol. 2004 Jan;43(1):66-70.
Kim SH, Kim JH, Baik GH, Baek I, Hahn T, Oh SO, Kim JB, Park SH, Chang WK, Kim DJ, Park CK, Park HR.
PMID 14745256
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