Biomechanical analysis of an interspinous fusion device as a stand-alone and as supplemental fixation to posterior expandable interbody cages in the lumbar spine - Gonzalez-Blohm, S A; Doulgeris, J J; Aghayev, K; Lee, W E, III; Volkov, A; Vrionis, F D (J Neurosurg Spine, 2014)