Epidemiological characteristics and outcomes of COVID-19 cases: mortality inequalities by socio-economic status, Barcelona, Spain, 24 February to 4 May 2020 
Politi, Julieta and Martín-Sánchez, Mario and Mercuriali, Lilas and Borras-Bermejo, Blanca and Lopez-Contreras, Joaquín and Vilella, Anna and Villar, Judit and COVID-19 Surveillance Working Group of Barcelona and Orcau, Angels and de Olalla, Patricia Garcia and Rius, Cristina, Eurosurveillance, 26, 2001138 (2021), https://doi.org/10.2807/1560-7917.ES.2021.26.20.2001138