- Correspondence to Professor Patrik Danielson, Department of Integrative Medical Biology, Anatomy, Umeå University, Umeå, SE-901 87, Sweden;
- Received August 8, 2017
- Revised November 24, 2017
- Accepted December 9, 2017
- First published January 6, 2018.
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.