Jiang, Yuan-Hong
Liao, Chun-Hou
Kuo, Hann-Chorng
Article History
First Online: 11 August 2015
Change Date: 18 August 2015
Change Type: Correction
Change Details: In the version of this article initially published online registered trademark symbols were not included for all instances of uses of the proprietary product names Botox<sup>®</sup>, Dysport<sup>®</sup>, Xeomin<sup>®</sup> and Prosigne<sup>®</sup>. The error has been corrected for the print, HTML and PDF versions of the article.
Competing interests
: The authors declare no competing financial interests.