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As infants, Kambry and Keeley were diagnosed with severe bronchopulmonary dysplasia, a chronic lung disease that makes breathing difficult.

Ventilation that kept her alive would lead to lung damage known as bronchopulmonary dysplasia.

The lung disease bronchopulmonary dysplasia often occurs in children who were born prematurely.

All of the children had been seen at the bronchopulmonary dysplasia clinic between January 2012 and January 2014.

National Heart, Lung, and Blood Institute has more about bronchopulmonary dysplasia.