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Validity of Ultrasonography-Guided Fine Needle Aspiration Biopsy according to the Number of Suspicious Ultrasonographic Characteristics, Including Solid Component, Ill-Defined Margin, Hypoechogenicity or Marked Hypoechogenicity, and Microcalcification or Macrocalcification
Values are expressed as percentage (number).
PPV, positive predictive value; NPV, negative predictive value; FNR, false negative rate.
