Primary care for patients with respiratory tract infection before and early on in the COVID-19 pandemic: an observational study in 16 European countries (BMJ Open, 2021)

(untitled) - van der Velden, AW; Bax, EA; Bongard, E; Munck Aabenhus, R; Anastasaki, M; Anthierens, S; Balan, A; Böhmer, F; Bruno, P; Chlabicz, S; Coenen, S; Colliers, A; et al.