van Tulder, M W Conservative treatment of acute and chronic nonspecific low back pain. A systematic review of randomized controlled trials of the most common interventions. [electronic resource] - Spine Sep 1997 - 2128-56 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't; Review; Systematic Review ISSN: 0362-2436 Standard No.: 10.1097/00007632-199709150-00012 doi Subjects--Topical Terms: Acute DiseaseChronic DiseaseDatabases, BibliographicHumansLow Back Pain--therapyRandomized Controlled Trials as TopicTreatment Outcome