Movement Disorder Society-Unified Parkinson Disease Rating Scale ( MDS-UPDRS ) III , Mini-Balance Evaluation Systems Test ( Mini-BESTest ) , gait velocity ( forward and backward ) , Timed Up and Go and dual-task Timed Up and Go , Six-Minute Walk Test ( @MWT ) , MDS-UPDRS II , MDS-UPDRS I , and Freezing of Gait Questionnaire .