FGF21 Requires βklotho to Act In Vivo Adams, Andrew C. ; Cheng, Christine C. ; Coskun, Tamer ; Kharitonenkov, Alexei Abstract Publication: PLoS ONE Pub Date: November 2012 DOI: 10.1371/journal.pone.0049977 Bibcode: 2012PLoSO...749977A