Ares-Blanco, Sara; Guisado-Clavero, Marina; Del Rio, Lourdes Ramos; Larrondo, Ileana Gefaell; Fitzgerald, Louise; Murauskienė, Liubovė; López, Naldy Parodi; Perjés, Ábel; Petek, Davorina; Petrazzuoli, Ferdinando; Petriček, Goranka; Sattler, Martin; Saurek-Aleksandrovska, Natalija; Senn, Oliver; Seifert, Bohumil; Serafini, Alice; Sentker, Theresa; Ticmane, Gunta; Tiili, Paula; Torzsa, Péter; Valtonen, Kirsi; Vaes, Bert; Vinker, Shlomo; Adler, Limor; Assenova, Radost; Bakola, Maria; Bayen, Sabine; Brutskaya-Stempkovskaya, Elena; Busneag, Iliana-Carmen; Divjak, Asja Ćosić; Peña, Maryher Delphin; Díaz, Esperanza; Domeyer, Philippe-Richard; Feldmane, Sabine; Gjorgjievski, Dragan; Gómez-Johansson, Mila; de la Fuente, Ángel Gónzalez; Hanževački, Miroslav; Hoffmann, Kathryn; Ільков, Оксана; Ivanna, Shushman; Jandrić-Kočić, Marijana; Karathanos, Vasilis Trifon; Üçüncü, Erva Kirkoç; Kirkovski, Aleksandar; Knežević, Snežana; Korkmaz, Büsra Çimen; Kostić, Milena; Krztoń-Królewiecka, Anna; Kozlovska, Liga; Nessler, Katarzyna; Gómez-Bravo, Raquel; Peña, María Pilar Astier; Lingner, Heidrun: Primary care indicators for disease burden, monitoring and surveillance of COVID-19 in 31 European countries: Eurodata Study