- Correspondence to Dr Marianna Virtanen, Department of Public Health and Caring Sciences, University of Uppsala, Uppsala 752 36, Sweden;
- Received April 25, 2018
- Revised September 22, 2018
- Accepted September 28, 2018
- First published October 16, 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.