Posterior Endoscopic Surgery for Lumbar Disc Herniation with Contralateral Symptoms - A Report of Two Cases - Nakagawa, Y; Yoshida, M; Kawakami, M; Ando, M; Hashizume, H; Minamide, A; Maio, K; Enyo, Y; Okada, M (min - Minimally Invasive Neurosurgery, 2006)