The role of preplacement roentgen examination of the spine in evaluation of low back pain.
D000328:Adult; D001416:Back Pain / Q000000981:diagnostic imaging*; D004185:Disability Evaluation; D004467:Economics; D004651:Employment; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D009784:Occupational Diseases / Q000000981:diagnostic imaging*; D009786:Occupational Health Services; D011859:Radiography; D011890:Railroads; D013124:Spinal Injuries / Q000000981:diagnostic imaging; D013997:Time Factors; D014481:United States; D014942:Workers' Compensation