A Validated Smartphone-Based Assessment of Gait and Gait Variability in Parkinson's Disease.
Ellis RJ, Ng YS, Zhu S, Tan DM, Anderson B, Schlaug G, Wang Y. A Validated Smartphone-Based Assessment of Gait and Gait Variability in Parkinson's Disease. PLoS One. 2015; 10(10):e0141694.