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Fluorescent 10 μm polystyrene microspheres (FluoSpheres®) with antegrade perfusion in renal artery (red), (A) visualizing afferent arteriole and glomerulus and retrograde perfusion in ureter (green), (B). Scale bar (A, B) 1 cm. Ten μm polystyrene FluoSpheres® (arrowhead) injected retrograde in the ureter and reaching Bowman's space. Scale bar (C, D) 50 μm.
