REX-1 Expression and p38 MAPK Activation Status Can Determine Proliferation/Differentiation Fates in Human Mesenchymal Stem Cells Bhandari, Dilli Ram ; Seo, Kwang-Won ; Roh, Kyoung-Hwan ; Jung, Ji-Won ; Kang, Soo-Kyung ; Kang, Kyung-Sun Abstract Publication: PLoS ONE Pub Date: May 2010 DOI: 10.1371/journal.pone.0010493 Bibcode: 2010PLoSO...510493B