Empirical/kinship correlation matrix between individuals.
This correlation matrix can be calculated based on the
familial relationship between individuals or large-scale
SNP data by omic data analysis toolkit FQLS. The free
software FQLS can be downloaded from
http://biostat.cau.ac.kr/fqls/. If correlation
matrix is estimated with the large-scale SNP data, the
proposed method becomes robust under the presence of
population substructure.