Template design. Subjects aged between 15 and 25 years old were assigned a value of one and all other samples a value of zero. The correlation between expression values in the 15–25 group and other samples is tested for each probe-set in turn, using Spearman rank correlation test.
Harris et al. BMC Medical Genomics 2009 2:28 doi:10.1186/1755-8794-2-28