Clinical evaluation included the use of the Unified Parkinson 's Disease Rating Scale ( UPDRS ) , Hoehn_Yahr score and Schwab England activities of daily living ( ADL ) score in 'on'- and 'off'-drug conditions before surgery and 6 months after surgery .
O O O O O O O O B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O