Zeldowicz, L R Long-term therapy of Parkinson's disease with amantadine, alone and combined with levodopa. [electronic resource] - Canadian Medical Association journal Oct 1973 - 588-93 p. digital Publication Type: Clinical Trial; Comparative Study; Controlled Clinical Trial; Journal Article ISSN: 0008-4409 Subjects--Topical Terms: Activities of Daily LivingAgedAmantadine--administration & dosageClinical Trials as TopicDihydroxyphenylalanine--administration & dosageEvaluation Studies as TopicFemaleFollow-Up StudiesHumansMaleMiddle AgedMotor Skills--drug effectsNeurologic ExaminationParkinson Disease--drug therapyPlacebosTime Factors