Cluster analysis reveals 7 clusters of the chemokine expression pattern.
Cluster analysis of the data obtained from CRS patients, based on chemokine measurements only (independent of clinical phenotype) resulted in the identification of 7 distinct clusters (Figure 1 ). The clusters were well separated from each other. Means and ratios of chemokines/ cytokines and phenotype data were calculated and tabulated as a heat map (Table 4 and Table 5 ) to characterize the clusters. From the examined CC- and CXC chemokines, ENA-78/CCL5 revealed no significant difference in the cluster analysis.