**Conflict of interest**

The authors declare that they have no conflict of interest to the publication of this review.

## **Author details**

Tsan-Hon Liou1 \*, Chun-De Liao2 and Shih-Wei Huang1

1 Department of Physical Medicine and Rehabilitation, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan

2 Department of Physical Medicine and Rehabilitation, Shuang Ho Hospital, Taipei Medical University, Taipei, Taiwan

\*Address all correspondence to: peter\_liou@s.tmu.edu.tw

© 2020 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
