Unilateral versus bilateral percutaneous kyphoplasty for osteoporotic vertebral fractures: a meta-analysis  
Gao Zhi-xiang, Li Chun, Li Lei, Huang Wei-min
Chinese Journal of Tissue Engineering Research . 2018, (7): 1140 -1148 .  DOI: 10.3969/j.issn.2095-4344.0130