title: Attitudinal change: the Chelsea back program.
mesh_terms: D000062:Accidents, Occupational / Q000517:prevention & control; D001290:Attitude; D019567:Back Injuries; D006801:Humans; D008404:Massachusetts; D009784:Occupational Diseases / Q000517:prevention & control / Q000628:therapy*; D009786:Occupational Health Services