Keller RB, Atlas SJ, Singer DE, Chapin AM, Mooney NA, Patrick DL, Deyo RA. The Maine Lumbar Spine Study, Part I. Background and concepts. Spine (Phila Pa 1976). 1996 Aug 1;21(15):1769-76.
Keller RB, Atlas SJ, Singer DE, Chapin AM, Mooney NA, Patrick DL, Deyo RA. The Maine Lumbar Spine Study, Part I. Background and concepts. Spine (Phila Pa 1976). 1996 Aug 1;21(15):1769-76.