Open Access
Volume 8, Number 3, September 2018
Article Number 16
Number of page(s) 6
Published online 24 August 2018

© Author(s) 2018. This article is published with open access by China Medical University

Licence Creative CommonsOpen Access This article is distributed under terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided original author(s) and source are credited.