Jankovic Joseph, Sherer Todd
Parkinson's Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, Houston, Texas.
Michael J. Fox Foundation for Parkinson's Research, New York, New York.
JAMA Neurol. 2014 Nov;71(11):1351-2. doi: 10.1001/jamaneurol.2014.1717.