@inbook{1133952240, author={Catherine Goodman and Kevin Helgeson}, title={Post-Polio Syndrome}, booktitle={Exercise Prescription for Medical Conditions: Handbook for Physical Therapists}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2011}, url={fadavispt.mhmedical.com/content.aspx?aid=1133952240} }