PT - JOURNAL ARTICLE AU - John B. Campbell TI - Long‐term treatment of Parkinson's disease with levodopa AID - 10.1212/WNL.20.12_Part_2.18 DP - 1970 Dec 01 TA - Neurology PG - 18--22 VI - 20 IP - 12 Part 2 4099 - http://n.neurology.org/content/20/12_Part_2/18.short 4100 - http://n.neurology.org/content/20/12_Part_2/18.full SO - Neurology1970 Dec 01; 20