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Surface under the cumulative ranking curve (SUCRA) of epoprostenol, treprostinil, iloprost, beraprost, and placebo according to 6-min walk distance (A), all-cause mortality (B), functional class amelioration (C), and discontinuation (D). The 5 possible ranks are on the horizontal axis, and the cumulative ranking probabilities (probability of each treatment to rank the first, the second best, and so on) are on the vertical axis. SUCRA = surface under the cumulative ranking curve.
