title: A randomized trial of exercise therapy in patients with acute low back pain--efficacy on sickness absence.
authors.forename: P P
authors.initials: PP
authors.lastname: Tygiel
authors.forename: S
authors.initials: S
authors.lastname: Anaya
authors.forename: A
authors.initials: A
authors.lastname: Porter
mesh_terms: D000208:Acute Disease; D002986:Clinical Trials as Topic; D005081:Exercise Therapy; D006801:Humans; D017116:Low Back Pain / Q000628:therapy*