- Correspondence to Dr Jennifer Chu, Department of Physical Medicine and Rehabilitation, Perelman School of Medicine, University of Pennsylvania. Mail to Jennifer Chu, 233 East Lancaster Avenue, Suite 101, Ardmore, PA 19003-2321, USA;
- Received November 16, 2016
- Revised April 24, 2017
- Accepted August 17, 2017
- First published September 16, 2017.
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