Utilizing centralized biorepository samples for biomarkers of cystic fibrosis lung disease severity. - Sagel SD; Wagner BD; Ziady A; Kelley T; Clancy JP; Narvaez-Rivas M; Pilewski J; Joseloff E; Sha W; Zelnick L; Setchell KDR; Heltshe SL; et al. (Journal of cystic fibrosis : official journal of the European Cystic Fibrosis Society, 2020)