- Correspondence to Dr Paula Meireles, EPIUnit, Instituto de Saúde Pública, Universidade do Porto, Rua das Taipas, nº 135, 4050-600, Porto, Portugal;
- Received March 2, 2021
- Accepted June 14, 2021
- First published June 30, 2021.
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.