- Professor M-W Yu, Graduate Institute of Epidemiology, College of Public Health, National Taiwan University, Room 522 No.17, Xuzhou Road Zhongzheng District, Taipei City 10055, Taiwan;
- Revised April 1, 2007
- Accepted April 24, 2007
- Final version accepted May 14, 2007
- First published May 14, 2007.
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.