- Correspondence to Dr Annice E Kim, Public Health Policy Research Program, RTI International, 3040 E. Cornwallis Road, P.O. Box 12194, Research Triangle Park, NC 27709, USA;
- Received February 6, 2015
- Accepted July 7, 2015
- First published July 23, 2015.
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.