Corrigendum to "Systemic and airway oxidative stress in competitive swimmers" [Respiratory Medicine 137 (2018) 129–133]. (September 2018) - Škrgat, Sabina; Korošec, Peter; Kern, Izidor; Šilar, Mira; Šelb, Julij; Fležar, Matjaž; Marčun, Robert