HDAC9 and Miyoshi myopathy: We found that the expression of HDAC1, HDAC2, HDAC3, and HDAC10 was not affected by monotherapy or combined treatment (Additional file 2: Figure S2A, B), which was consitent with our previous study that indicated that chidamide inhibited HDAC activity and did not affect the expression of HDAC1, HDAC2, HDAC3, and HDAC10 in human MM cell lines [33].