Investigating back pain.
D001416:Back Pain / Q000209:etiology*; D002573:Cervical Rib Syndrome / Q000175:diagnosis; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012272:Ribs / Q000002:abnormalities* / Q000601:surgery