Most human eQTL mapping studies to date assessed immortalized lymphoblastoid cell lines [4], [5], [6], [7], [8], [9], [10], [11], [12] and family-based samples from the CEPH [4], [5], [6], [7], [8], [13] (Centre d'Etude du polymorphisme humain) or HapMap [10], [11], [14], [15] repositories. Multiple other small and large scale eQTL studies investigated other tissues and populations including lymphocytes [16], monocytes [17], T-cells [18], fibroblasts [18], skin [19], subcutaneous and omental adipose tissue [20], [21], bone [22], liver [23] and brain [24], [25].
