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Minimum (triangles) and maximum (circles) regional anterior (A–D) and posterior (E–F) mitral leaflet angles in the five ring groups with (open symbols) and without (closed symbols) the respective ring inserted. Asterisks indicate that leaflet excursion (maximum minus minimum leaflet angle, see METHODS) for the respective leaflet angle is significantly smaller (p<0.05) compared to CTRL (see Table 2).
