WWC3 and Miyoshi myopathy: As for the validation of the top 10 downregulated circRNAs, circ-AFF2 (P < 0.001) (Fig. 5f), circ-WWC3 (P < 0.001) (Fig. 5g), circ-DNAJC5 (P = 0.008) (Fig. 5p), circ-KLHL2 (P = 0.006) (Fig. 5q), circ-IQGAP1 (P < 0.001) (Fig. 5r) and circ-AL137655 (P = 0.001) (Fig. 5s) expressions were lower in MM patients compared with HCs, while circ-SLAIN1 (P = 0.146) (Fig. 5m), circ-WDR37–1 (P = 0.292) (Fig. 5n), circ-WDR37–2 (P = 0.199) (Fig. 5o) and circ-ASPA1 (P = 0.434) (Fig. 5t) levels were similar between MM patients and HCs.