RELEVANCE OF DISC TISSUE COMPOSITION, MORPHOLOGY AND ANNULAR LESIONS WITH RESPECT TO LUMBAR DISC DEGENERATION: GP61 Natarajan, Raghu; An, Howard; Andersson, Gunnar Natarajan, Raghu; An, Howard; Andersson, Gunnar Less Spine Journal Meeting Abstracts. :, October 2011. Favorites PDF Get Content & Permissions Free