Correction: Systemic Administration of Allogeneic Mesenchymal Stem Cells Does Not Halt Osteoporotic Bone Loss in Ovariectomized Rats

• Shuo Huang, 
• Liangliang Xu, 
• Yuxin Sun, 
• Sien Lin, 
• Weidong Gu, 
• Yamei Liu, 
• Jinfang Zhang, 
• Lin Chen, 
• Gang Li