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Hierarchical dendrogram based on weighted UniFrac distance. Unweighted Pair Group Method with Arithmetic mean clustering revealed 2 clusters with 28 patients in cluster 1 and 20 patients in cluster 2. Patients with psychological distress are indicated in red (dark gray in print grayscale image), those without psychological distress in green (light grey in print). Color image is available only in online version (www.psychosomaticmedicine.org).
