title: Behavioral-graded activity compared with usual care after first-time disk surgery: considerations of the design of a randomized clinical trial.
authors.forename: R J
authors.initials: RJ
authors.lastname: Feise
mesh_terms: D002684:Chiropractic; D017586:Diskectomy; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012107:Research Design