Randomized Controlled Trial
Cost-effectiveness of lumbar fusion and nonsurgical treatment for chronic low back pain in the Swedish Lumbar Spine Study: a multicenter, randomized, controlled trial from the Swedish Lumbar Spine Study Group.
Spine. 2004 Feb 15;29(4):421-34; discussion Z3.
Randomized Controlled Trial
Sick leave reductions from a comprehensive manual therapy programme for low back pain: the Gotland Low Back Pain Study.
Clin Rehabil. 2008 Jun 1;22(6):529-41.
Multicenter Study
Racial differences in the use of lumbar spine radiographs: results from the Veterans Health Study.
Spine. 2001 Jun 15;26(12):1364-9.