Rim, Dae Cheol Quantitative Pfirrmann Disc Degeneration Grading System to Overcome the Limitation of Pfirrmann Disc Degeneration Grade. [electronic resource] - Korean Journal of Spine Mar 2016 - 1-8 p. digital Publication Type: Journal Article ISSN: 1738-2262 Standard No.: 10.14245/kjs.2016.13.1.1 doi