Circulating Fibroblast Growth Factor 21 Levels Are Closely Associated with Hepatic Fat Content: A Cross-Sectional Study Yan, Hongmei ; Xia, Mingfeng ; Chang, Xinxia ; Xu, Qiong ; Bian, Hua ; Zeng, Mengsu ; Rao, Shengxiang ; Yao, Xiuzhong ; Tu, Yinfang ; Jia, Weiping ; Gao, Xin Abstract Publication: PLoS ONE Pub Date: September 2011 DOI: 10.1371/journal.pone.0024895 Bibcode: 2011PLoSO...624895Y