Use of nerve elongator to repair short-distance peripheral nerve defects: a prospective randomized study oleh Lu Bai, Tian-bing Wang, Xin Wang, Wei-wen Zhang, Ji-hai Xu, Xiao-ming Cai, Dan-ya Zhou, Li-bing Cai, Jia-dong Pan, Min-tao Tian, Hong Chen, Dian-ying Zhang, Zhong-guo Fu, Pei-xun Zhang, Bao-guo Jiang