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Hierarchical ascendant classification on principal component analysis (PCA) of the study sample. X- and Y-axes are the two first dimensions issued from the PCA. Patients are denoted 1–10 for the allergic bronchopulmonary aspergillosis (ABPA) group and 11–49 for the Aspergillus fumigatus (Af)-cystic fibrosis (CF) group. Af-sensitized patients without ABPA (Af-CF) are mostly found in the homogenous cluster 1 (34/39), while ABPA patients are mostly found in cluster 2 (6/10).
