Three-level and four-level anterior cervical discectomies and titanium cage-augmented fusion with and without plate fixation. - Hwang,S.L.; Lin,C.L.; Lieu,A.S.; Lee,K.S.; Kuo,T.H.; Hwang,Y.F.; Su,Y.F.; Howng,S.L. (J Neurosurg Spine, 2004)