AD	adipose tissue-derived
NELL-1	Nel-like protein-1
ONFH	osteonecrosis of the femoral head
hSVF	human stromal vascular fraction
PBS	phosphate buffered saline
DMEM	dulbecco’s modified eagle’s medium
FACS	fluorescence-activated cell sorter
FBS	fetal bovine serum
HUVECs	human umbilical vein endothelial cells
WST	water-soluble tetrazolium salt
CAM	chick chorioallantoic membrane
ACS	absorbable collagen sponge
CT	computed tomography
BMD	bone mineral density
PG	pericytes group
PNG	pericytes + NELL-1 group