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Fig. 5 Box plot shows median and interquartile range of serum levels of prolactin in pulmonary hypertension subgroups: control, idiopathic pulmonary artery hypertension (IPAH), chronic thromboembolic pulmonary hypertension (CTEPH), and portopulmonary hypertension (PoPH). Four extremes for prolactin are not shown in the figure due to the scaling.° = outliers; * = extremes
