- Correspondence to Dr Joanne Klevens, National Center for Injury Prevention and Control, Centers for Disease Control and Prevention (CDC), 4770 Buford Hwy, Mailstop F-63, Atlanta GA 30340, USA;
- Received May 28, 2015
- Revised November 17, 2015
- Accepted November 28, 2015
- First published February 11, 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.