title: Research methods in occupational low-back pain.
authors.affiliation: Department of Orthopaedics, Sahlgren Hospital, University of Gothenberg, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Nachemson
mesh_terms: D001416:Back Pain; D006801:Humans; D009784:Occupational Diseases; D012107:Research Design