sociation with operations on the lumbar spine. The Influence of age. diagnosis. and procedure. /BoneJoint Wig. Am. 74.536543 (1992). 103.Gallano. K.. Obwegeser A A Gaol M V Bauer. R. & Twerdy. K. Longterm outcome of laminectemy fa spinal stenosis in octogenarians. Spine 30.332-335 (2005). 104. Jonsson. B.. Annertz. M