3. To determine if GH use in CF patients positively impacts quality of life. At baseline and every six months, we will administer a 15 minute questionnaire to both the parent and patient to assess quality of life. These questionnaires entitled "The Cystic Fibrosis Questionnaire" have been recently developed and tested for quality. They are specific for CF patients and have been approved by the National CF Foundation. This specific aim will test the hypothesis that GH use improves quality of life in CF patients.