- Correspondence to Dr Carolyn Dresler, Arkansas Department of Health, 4815 West Markham St. Little Rock, Arkansas 72207, USA;
- Received April 5, 2011
- Accepted August 29, 2011
- First published February 16, 2012.
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.