The<unk>  measures the concentration of chloride that is excreted in<unk> . It is used to screen for cystic fibrosis (CF). Due to defective chloride channels (CFTR), the concentration of chloride in<unk>  is elevated in individuals with CF.
Sweat test
Salicylate testing
Heaf test
Peanut butter test
Sweat diagnostics
Kveim test
Schilling test
Gluten challenge test