Anterior cervical discectomy and fusion with implantable titanium cage: initial impressions, patient outcomes and comparison to fusion with allograft. [An erratum appears in Spine J 2004 May-Jun; 4 (3): following table of contents]. - Moreland,D.B.; Asch,H.L.; Clabeaux,D.E.; Castiglia,G.J.; Czajka,G.A.; Lewis,P.J.; Egnatchik,J.G.; Cappuccino,A.; Huynh,L. (Spine J, 2004)