Hypoxia inducible factor-1 alpha and apoptosis of osteocytes in steroid-induced avascular necrosis of the femoral head 
Zhao Zhen-qun, Zhang Zhi-feng, Liu Wan-lin, Bai Rui, Wang Wen-xuan, Sun Liang
Chinese Journal of Tissue Engineering Research . 2015, (51): 8201 -8207 .  DOI: 10.3969/j.issn.2095-4344.2015.51.001