Conflict of Interest Disclosure	Grant/research funding and support
Miriam R. Rafferty	Data processing, data analysis, data interpretation, statistical analysis, drafting and revising the manuscript	Unrelated to the submitted research project, I received honoriarium for participation as an external site reviewer for the National Parkinson Foundation (which published the Fitness Counts exercise program) Quality Improvement Initiative.	Research and training support from the Foundation for Physical Therapy, University of Illinois at Chicago Center for Clinical and Translational Science, National Institute of Mental Health, National Institute of Disability, Independent Living, and Rehabilitation Research.
Janey Prodoehl	Data interpretation, manuscript preparation, and critical manuscript revision	*	NIH
Julie A. Robichaud	Study concept and design, obtaining funding, data acquisition, and critical manuscript revision	*	NIH
Fabian J. David	Data acquisition, statistical analyses, and critical manuscript revision	*	NIH
Cynthia Poon	Data acquisition and critical manuscript revision	*	NIH
Lisa C. Goelz	Data acquisition, data processing, and critical manuscript revision	*	NIH
David E. Vaillancourt	Study concept and design, obtaining funding, study supervision and technical support, and critical manuscript revision	*	NIH, Michael J. Fox, and consults for projects at UT Southwestern Medical Center and Great Lakes NeuroTechnologies
Wendy M. Kohrt	Study concept and design, obtaining funding, study supervision, and critical manuscript revision	*	DoD and consulting fees from the NIH
Cynthia L. Comella	Study concept and design, obtaining funding, study supervision, participant recruitment, and critical manuscript revision	*	Research support from Allergan Inc., Merz Pharmaceuticals, Ipsen Limited, NIH, and Parkinson Disease Foundation and consulting fees from Neupathe, Allergan Inc., Merz Pharmaceuticals, Ipsen Limited and Medtronic Corporation.
Daniel M. Corcos	Study concept and design, obtaining funding, study supervision and technical/administrative/material support, and critical manuscript revision	*	NIH and Michael J. Fox, and receives lecture and reviewer fees from NIH.

^*No significant conflicts of interest disclosed