Microendoscopic Discectomy for Lumbar Disc Herniation with Bony Fragment Due to Apophyseal Separation - Matsumoto, M; Watanabe, K; Tuji, T; Ishii, K; Takaishi, H; Nakamura, M; Chiba, K; Toyama, Y (min - Minimally Invasive Neurosurgery, 2007)