Letter: "Here we go again".
D001416:Back Pain / Q000209:etiology; D004651:Employment; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging*; D009787:Occupational Medicine; D010388:Pelvis / Q000000981:diagnostic imaging*; D010808:Physical Examination / Q000592:standards; D011859:Radiography; D013131:Spine / Q000002:abnormalities; D013314:Stress, Mechanical