J. P. Dinis Teixeira, Santos, M., Patrícia Soares, Luísa de Azevedo, Patrícia Barbosa, Andreia Vilas Boas...Nunes, C. (2023). LOCUS (LOng Covid–Understanding Symptoms, events and use of services in Portugal): A three-component study protocol. PLOS ONE. 18 (4), e0285051