Complications of degenerative lumbar spondylolisthesis and stenosis surgery in patients over 80 s: comparative study with over 60 s and 70 s. Experience with 678 cases. - Aimar E; Iess G; Mezza F; Gaetani P; Messina AL; Todesca A; Tartara F; Broggi G (Acta neurochirurgica, 2022)