My kids each have 1 mutation - s1235r. They both have a lot of pancreatic stuff going on, as well as some respitory issues. DS tends to get pnuemonia a few times a year, and DD has a lot of sinus issues. Right now they are labled as CRMS, and we see pulm every 4 months. He feels that they are just carriers. I don't agree, am tired of fighting with them.