Effects of an Antioxidant-enriched Multivitamin in Cystic Fibrosis. A Randomized, Controlled, Multicenter Clinical Trial. - Sagel SD; Khan U; Jain R; Graff G; Daines CL; Dunitz JM; Borowitz D; Orenstein DM; Abdulhamid I; Noe J; Clancy JP; Slovis B; et al. (American journal of respiratory and critical care medicine, 2018)