Gait Declines Differentially in, and Improves Prediction of, People with Parkinson's Disease Converting to a Freezing of Gait Phenotype. - Virmani, Tuhin; Landes, Reid D.; Pillai, Lakshmi; Glover, Aliyah; Larson-Prior, Linda; Prior, Fred; Factor, Stewart A. (Journal of Parkinson's Disease, 2023)