What nine conditions should be considered in the differential diagnosis of recurrent pneumonia?

1. CF
2. Atopic asthma (pulmonary shadows usually indicate atelectasis)
3. GERD
4. Tracheoesophageal fistula
5. Chronic granulomatous disease or other immune deficiency
6. BPD
7. Bronchiectasis
8. Foreign body
9. Sequestration