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Four-dimensional ultrasound data of 577 women with LUTS were retrospectively analyzed. The bladder neck and genital hiatus were assessed during resting, coughing and squeezing. The bladder neck location, genitohiatal size, and genitohiatal location were evaluated with bladder neck distance (BNd) and bladder neck angle (BNa), genitohiatal dimension (GHd) and genitohiatal area (GHAR), and genitohiatal angle (GHa), respectively.
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