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2. Villar's nodule: a case report and systematic literature review of endometriosis externa of the umbilicus. Victory R; Diamond MP; Johns DA J Minim Invasive Gynecol; 2007; 14(1):23-32. PubMed ID: 17218225 [TBL] [Abstract][Full Text] [Related]
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5. Images in clinical medicine. Villar's nodule--umbilical endometriosis. Weng CS; Yang YC N Engl J Med; 2011 May; 364(21):e45. PubMed ID: 21612465 [No Abstract] [Full Text] [Related]
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