Buprenorphine transdermal patches as preemptive analgesia 
Ren Xiao-feng, Ren Na-na, Zhang Ai-wen, Ha Cheng-zhi, Zheng Song-hao, Liu Ning, Xu Jian
Chinese Journal of Tissue Engineering Research . 2015, (21): 3339 -3343 .  DOI: 10.3969/j.issn.2095-4344.2015.21.011