Changes in optimal stimulation frequency with time for gait disturbances in patients with PD after STN-DBS—A longitudinal study oleh Sruthi Kola, Ravi Prakash Rangam, Rukmini M Kandadai, Rajesh Alugolu, Raghuram Kedasi, Pavan Swamygowda, VVSRK Prasad, Sai Sri Lakshmi Meka, Syed T Fathima, Rupam Borgohain