- Correspondence to Professor Dr Andreas Sing, Bavarian Health and Food Safety Authority, Veterinärstrasse 2, 85764 Oberschleissheim, Germany;
- Accepted April 30, 2012
- First published May 23, 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.