These included four known MM risk loci (Fig. 1a and Supplementary Table 1; refs 14, 15) and three previously unknown loci at 5q15 (ELL2), 5q31 (ARHGAP26) and 22q13 (HMGXB4-TOM1; Supplementary Table 2). Here, ARHGAP26 is linked to Miyoshi myopathy.