- Correspondence to Dr Sture Forsgren, Department of Integrative Medical Biology, Section for Anatomy, Umeå University, Umeå SE 901 87, Sweden;
- Accepted October 30, 2012
- First published November 28, 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.