Visualization of similarities between salivary profiles by hierarchical clustering analysis (average linkage method, Pearson correlation). Samples are depicted in the columns. Siblings, who participated in the study, are marked by the same colour, each colour representing different family. Unrelated individuals have no colour code.
Crielaard et al. BMC Medical Genomics 2011 4:22 doi:10.1186/1755-8794-4-22