RT Journal Article SR Electronic T1 Long‐term appraisal of levodopa therapy JF Neurology JO Neurology FD Lippincott Williams & Wilkins SP 22 OP 24 DO 10.1212/WNL.22.5_Part_2.22 VO 22 IS 5 Part 2 A1 André Barbeau YR 1972 UL http://n.neurology.org/content/22/5_Part_2/22.abstract AB