The mPower study, Parkinson disease mobile data collected using ResearchKit. Brian M. Bot, Christine Suver, Elias Chaibub Neto, Michael Kellen, Arno Klein, Christopher Bare, Megan Doerr, Abhishek Pratap, John Wilbanks, E. Ray Dorsey, Stephen H. Friend & Andrew D. Trister. Scientific Data, Mar 3, 2016. doi:10.1038/sdata.2016.11