论文名：Combined expression trait
correlations and expression quantitative trait locus mapping
杂志：PLoS Genetics, Vol. 2, e6.
作者：Lan H, Chen M, Flowers JB, Yandell BS, Stapleton DS, Mata CM, Mui E, Flowers MT, Schueler
KL, Manly KF, Williams RW, Kendziorski C, and Attie AD (2006)