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Effects of needle diameter on fistula diameter. (A–C) Representative photomicrographs showing histology of fistulae created using different needle diameters (A, 28G; B, 25G; C, 22G). The red star shows the maximal diameter of the fistula. A small amount of thrombus is seen at the fistula as little flushing was performed in these specimens to prevent anastomotic distention. (D) Mean anastomotic diameter. n = 3 for each group; P = 0.33.
