Authors: Eugene J Carragee; Eric L Hurwitz; Ivan Cheng; Linda J Carroll; Margareta Nordin; Jaime Guzman; Paul Peloso; Lena W Holm; Pierre Côté; Sheilah Hogg-Johnson; Gabrielle van der Velde; J David Cassidy; Scott Haldeman Journal: Spine (Phila Pa 1976) Date: 2008-02-15 Impact factor: 3.468