Effects of combined transplantation of bone marrow stromal cell conditioned medium and neural stem cells on the behavior and cognition of Parkinson’s disease rats: Whether the outcomes of their combination are better than neural stem cell transplantation alone? Chinese Journal of Tissue Engineering Research . 2010, (19): 3465 -3470 .  DOI: 10.3969/j.issn.1673-8225.2010.19.010