- Correspondence to Nynke Spinder, Department of Epidemiology, University Medical Center Groningen, Groningen, Netherlands;
- Received August 13, 2019
- Revised November 27, 2019
- Accepted December 14, 2019
- First published January 16, 2020.
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.