All the 48 patients with CF and RP/CP (Table 2) and the 35 with CF without pancreatitis (Table 3) had a pathological sweat test (i.e., > 60 mEq/L) with the exception of a patient with CF without pancreatitis that had a value of 53 mEq/L, and all patients from both the groups had two CFTR mutations with the exception of a patient with CF and RP in which only one mutation was known. The gene discussed is CFTR; the disease is cystic fibrosis.