Correction: MicroRNA-29a induces loss of 5-hydroxymethylcytosine and promotes metastasis of hepatocellular carcinoma through a TET–SOCS1–MMP9 signaling axis - Qing Chen; Dan Yin; Yong Zhang; Lei Yu; Xue-Dong Li; Zheng-Jun Zhou; Shao-Lai Zhou; Dong-Mei Gao; Jie Hu; Cheng Jin; Zheng Wang; Ying-Hong Shi; et al. (Cell Death and Disease)