- Correspondence to Dr Stefan Nilsson, University of Gothenburg Institute of Health and Care Sciences, 413 46 Goteborg, Sweden;
- Received June 19, 2019
- Revision received November 6, 2019
- Accepted November 25, 2019
- First published December 13, 2019.
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.