4Javid MJ. Chemonuchcolysis versus laminectomy .A cohort comparison of effectiveness and charges.Spine,1995,20:2016～2022.
5Ramirez LF, Amundsen T,Vandvik B.Lumbar disk prolapase and radiological apina intervention.What do the randomized controlled treials say? Neurosurgery,1989,25:226～231.
