<prompt> Cutoff value of sweat chloride values above which 2 consistantly higher reading is diagnostic for Cystic fibrosis is40 mEq L50 mEq L60 mEq L70 mEq L  <response>: One or more clinical features of Cystic FibrosisTwo consistently 60 mEq L Sweat chloridevalues is diagnostic of Cystic fibrosis. 