COX6C and myalgic encephalomeyelitis/chronic fatigue syndrome: Similarly, HERV levels, highly correlating with ME/CFS diagnosis for subgroup 2 [9], showed moderate to strong associations with TTMV9 expression, e.g., MLT1_14q32.33 (R = 0.69, p = 0.00007), located within the lncRNA LINC02298, and MLT1_5q11.2 (R = 0.63, p < 0.0001), 25 kbp away from the gene COX6C (Figure 2A,C).