Silva Filho, Luiz Vicente Ferreira da, Maria Helena de Carvalho Ferreira Bussamra, Cleyde Miriam Aversa Nakaie, Fabíola Villac Adde, Joaquim Carlos Rodrigues, Salmo Raskin, and Tatiana Rozov. 2003. “ Cystic Fibrosis With Normal Sweat Chloride Concentration: Case Report ”. Revista Do Hospital Das Clínicas 58 (5): 260-62. https://doi.org/10.1590/S0041-87812003000500005.