Table 3. Classification of CFTR mutations in this study.

1717-1G>A	Class I	altered splicing
365insT	Class I	frameshift
4243-3T>A	Class V	altered splicing
A455E	Class II, V	missense
F508del	Class II, III, VI	amino acid deletion
IVS11-1G>C	Class I	altered splicing
R553X	Class I	nonsense
S1252N	Class III	missense