Preemployment back X-rays.
D001415:Back / Q000000981:diagnostic imaging*; D019567:Back Injuries; D006801:Humans; D008159:Lumbar Vertebrae / Q000002:abnormalities; D009784:Occupational Diseases / Q000517:prevention & control; D009787:Occupational Medicine; D010808:Physical Examination; D011859:Radiography; D014938:Work Capacity Evaluation