Study protocol for monitoring SARS-CoV-2 infection and its determinants in Catalonia (Spain): an observational and participatory research approach in a Sentinel Network of Schools oleh Jordi Sunyer, Alexis Sentís, Maria Mendoza, Antoni Soriano-Arandes, Juliana Esperalba, Tomas Pumarola, Jordi Casabona, Andreu Colom-Cadena, Isabel Martinez, Cinta Folch, Xavier Duran, Albert Blanco, Juliana Maria Reyes-Urueña, Ignacio Blanco, Belén Pérez, Josep Vidal, Pere Soler-Palacin, Mireia Gascón, Carmen Cabezas, Jacobo Mendioroz, Pere-Joan Cardona, Yesika Díaz, Juliana Reyes-Urueña, Anna Bordas, Maria Subirana, Rosina Malagrida, Andres Anton, Jessica Fernández-Morales, Josep Basora, Pol Romano, Esteve Muntada, Jessica Fernández, Antonio Soriano, Cristina Andrés, Maria Victoria González, Gema Fernández, Cristina Esteban, Lucia Alonso, Jordi Aceiton, Marcos Montoro, Marina Herrero, Alba García, Juan Rus, Esperança Macià i Silvia Burgaya, Mª Teresa Riera-Bosch, Elisabet Sola, Lidia Aulet, Lidia Busquets, Xavier Perramon, Júlia Sebastià, Ana Moreno, Anna Gatell, Maria Coma, Ariadna Mas, Maria Antònia Llopis, Sandra Pequeño