Choy, D S The problem of the L5-S1 disc solved by needle entry with an extrathecal approach. [electronic resource] - Journal of clinical laser medicine & surgery Dec 1994 - 321-4 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1044-5471 Standard No.: 10.1089/clm.1994.12.321 doi Subjects--Topical Terms: Diskectomy, Percutaneous--instrumentationFollow-Up StudiesHumansIntervertebral Disc Displacement--diagnostic imagingLaser Therapy--instrumentationLumbar VertebraeNeedlesRadiographySacrum