Participants needed for collection of nasal cells

In this study, we will measure CFTR function in healthy controls, healthy cystic fibrosis (CF) carriers, and CF carriers with cystic fibrosis–like illness. What is involved? A five-minute nasal brushing performed at the Johns Hopkins Outpatient Center and a review of your medical history for CF-like illnesses. You must be between 5 and 80 years old. Participants will be reimbursed for one meal. If you are interested in participating, contact Jamelia Maynard at 202-870-1395 or