Potential Role of microRNA-21 in the Diagnosis of Gastric Cancer: A Meta-Analysis Zeng, Zongyue ; Wang, Jiangen ; Zhao, Liuyang ; Hu, Ping ; Zhang, Hailong ; Tang, Xi ; He, Dali ; Tang, Shifu ; Zeng, Zhaofang Abstract Publication: PLoS ONE Pub Date: September 2013 DOI: 10.1371/journal.pone.0073278 Bibcode: 2013PLoSO...873278Z