The biomechanical effect of postoperative hypolordosis in instrumented lumbar fusion on instrumented and adjacent spinal segments. - Umehara,S.; Zindrick,M.R.; Patwardhan,A.G.; Havey,R.M.; Vrbos,L.A.; Knight,G.W.; Miyano,S.; Kirincic,M.; Kaneda,K.; Lorenz,M.A. (Spine, 2000)