2012b-320 610 diseases krankheit minimal-invasivechirurgie minimallyinvasivesurgicalprocedures nerves neurochirurgie peripheral peripheralnerves peripheresnervensystem rückenmarksverletzung spinalcord spinalcorddiseases spinalcordinjuries spinaldiseases spine surgery treatment wl400 wl500 woundsandinjuries yg6300 yk6705 yk6900