- Correspondence to Paraskevi Seferidi, Public Health Policy Evaluation Unit, Imperial College London School of Public Health, London W6 8RP, UK;
- Received October 5, 2019
- Revision received November 29, 2019
- Accepted December 20, 2019
- First published January 14, 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.