作者机构:[1]the Second Department of Orthopaedics, Medical School of Xi'an Jiaotong University, Xi'an 710004, China., [2]Department of Neurosurgery, the Second Affiliated Hospital, Medical School of Xi'an Jiaotong University, Xi'an 710004, China
相关基金:This study was supported by the National Natural Science Foundation of China (No. 30371442) and New Teachers' Foundation of Ministry of Education(No. 20070698073)