CASC3 and Miyoshi myopathy: Combination of BTZ and MLN8237 exerted limited synergistic effect on MM.1S cells derived tumours, but a marvellous synergistic anti‐MM growth effect was observed on LP‐1 cells derived xenograft model (Figure 7A,B), and overall survival was significantly prolonged only in mice bearing LP‐1 cells derived tumours (Figure 7C,D).