A meta-analysis of proximal femoral nail anti-rotation, dynamic hip screw and total hip arthroplasty for intertrochanteric fractures in the elderly  
Qiao Yong-jie, Cao Xue-fei, Zhang Lv-dan, Wang Qin-peng, Zhen Ping
Chinese Journal of Tissue Engineering Research . 2015, (31): 5057 -5064 .  DOI: 10.3969/j.issn.2095-4344.2015.31.026