- Correspondence to Dr Joseph Jankovic, Department of Neurology, Parkinson's Disease Center and Movement Disorders Clinic, Baylor College of Medicine, The Smith Tower, Suite 1801, 6550 Fannin, Houston, TX 77030, USA;
- Received May 16, 2013
- Revised October 11, 2013
- Accepted October 20, 2013
- First published November 20, 2013.
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