Microendoscopic discectomy versus microscopic discectomy for treatment of lumbar disc herniations: a systematic review of randomized controlled trials
LIU Qing-guo, SONG Zhi-bin, GAO Jian-wei, LI Xu-guang, WU Yun-li
Chinese Journal of Contemporary Neurology and Neurosurgery . 2012, (4): 399 -406 .  DOI: 10.3969/j.issn.1672-6731.2012.04.006