After discharge, commensurate with standard current clinical practice, all patients will receive a follow-up appointment with a chest x-ray at 6 months and 1 year of life. After this time, follow-up appointments will be made each year for the first 5 years of life and imaging will be obtained on the basis of symptoms. Any further follow-up will be as needed for symptoms. Oxygen requirements, findings at follow-up and future hospitalization will be recorded, particularly looking at the presence or absence of hernia recurrence. The study will mature and effectively close when all subjects have reached 5 year follow-up.