- Correspondence to Dr Yao-Mao Chang, College of Public Health, College of Management, Taipei Medical University; 250 Wuxing St. Taipei 11031, Taiwan;
- Received August 16, 2016
- Accepted November 16, 2016
- First published December 2, 2016.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.