GPC5 and hepatocellular carcinoma: RETRACTION: LiuT., ZhangX., ShaK., LiuX., ZhangL. and WangB., “miR‐709 Up‐Regulated in Hepatocellular Carcinoma, Promotes Proliferation and Invasion by Targeting GPC5,” Cell Proliferation48, no. 3 (2015): 330–337, 10.1111/cpr.12181.