Exocrine Pancreatic Function Testing in Cystic Fibrosis

The purpose of this study is to develop and validate multimodal testing of exocrine pancreatic function. The investigators will be testing exocrine pancreatic function in patients with cystic fibrosis. Exocrine pancreatic function and imaging will be correlated to age group, genotype, nutritional status and quality of life. Earlier detection of exocrine pancreatic failure in the non classical form of CF may be of therapeutically benefit.