Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Bronchopulmonary Dysplasia ?
    ### Response:
    Infants who are born earlyusually more than 10 weeks before their due datesand still need oxygen therapy by the time they reach their original due dates are diagnosed with bronchopulmonary dysplasia (BPD).
                
BPD can be mild, moderate, or severe.
    