The TGF-β signalling pathway, involved in diverse cellular processes including cell proliferation, differentiation, apoptosis, and migration invasion, was also one of the pathways enriched with 10 eQTL genes regulated by endometriosis, osteoarthritis, and multiple sclerosis-associated variants (Fig. 2, Supplementary Tables S13, S14, S15 and S16). Here, TGFB1 is linked to osteoarthritis.