- Correspondence to Dr David B Resnik, NIEHS/NIH, Box 12233, Mail Drop CU 03, Research Triangle Park, NC 27709, USA; .
- Received April 25, 2013
- Revised May 31, 2013
- Accepted July 9, 2013
- First published July 26, 2013.
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.