Fibroblast Growth Factor 2 (Fgf2) Inhibits Differentiation of Mesenchymal Stem Cells by Inducing<i>Twist2</i>and<i>Spry4</i>, Blocking Extracellular Regulated Kinase Activation, and Altering Fgf Receptor Expression LevelsWen‐Tzu Lai, Donald G. Phinney|Stem Cells|2011Cited by 85