Table 1.

Group design and interventions.

Group	1st treatment (12 wk)	2nd treatment (15 wk)
Saline (n=6)	5 ml 0.9% normal saline	5 ml 0.9% normal saline
HA (n=6)	2.5 ml 0.9% normal saline + 2.5 ml HA	2.5 ml 0.9% normal saline + 2.5 ml HA
Low (n=6)	1×107 ASCs/2.5 ml saline) + 2.5 ml HA	1×107 ASCs/2.5 ml saline) + 2.5 ml HA
High (n=6)	5×107 ASCs/2.5 ml saline) + 2.5 ml HA	5×107 ASCs/2.5 ml saline) + 2.5 ml HA
SVF (n=6)	1×107 SVF/2.5 ml saline) + 2.5 ml HA	1×107 SVF/2.5 ml saline) + 2.5 ml HA
Tracing (n=4)	5×107 SPIO-ASCs/2.5 ml saline) + 2.5 ml HA	/

ASC: adipose mesenchymal stem cell; HA: hyaluronic acid; SPIO: superparamagnetic iron oxide particle; SVF: stromal vascular fraction.