Erk1 Positively Regulates Osteoclast Differentiation and Bone Resorptive Activity. - Yongzheng He; Staser, Karl; Rhodes, Steven D.; Yaling Liu; Xiaohua Wu; Su-Jung Park; Jin Yuan; Xianlin Yang; Xiaohong Li; Li Jiang; Shi Chen; Feng-Chun Yang (PLoS ONE, 2011)