@inbook{55790287, author={Seth L. Pullman and Rachel Saunders-Pullman}, editor={Watts, Ray L. and Standaert, David G. and Obeso, Jose A.}, title={Chapter 2. Assessing Disability in Movement Disorders: Quantitative Techniques and Rating Scales}, booktitle={Movement Disorders, 3e}, publisher={The McGraw-Hill Companies}, address={New York, NY}, year={2012}, url={accessphysiotherapy.mhmedical.com/content.aspx?aid=55790287} }