preferred_name: Low to normal range of nerve conduction velocity (NCV) (30-40 m/s)
preferred_name_lc: low to normal range of nerve conduction velocity (ncv) (30-40 m/s)
label: Low to normal range of nerve conduction velocity (NCV) (30-40 m/s)
label_lc: low to normal range of nerve conduction velocity (ncv) (30-40 m/s)