The impact of selected behavioural and environmental factors on the incidence of upper respiratory tract infections in Polish children - Ślęzak, Katarzyna; Dembiński, Łukasz; Konefał, Artur; Dąbrowski, Mikołaj; Mazur, Artur; Kruk, Agnieszka; Konefał, Dorota; Wawrykow, Paweł; Jackowska, Teresa; Szczepański, Tomasz; Peregud-Pogorzelski, Jarosław (Pediatria Polska - Polish Journal of Paediatrics, 2022)