2009d-845 2009i-122 adolescent chest child childhood children'shealth diagnosis diseases etiology fitness health infant infants ininfancy intensivecareunits lungdiseases medical newborn nursing pediatric pediatricintensivecare pediatricradiography pediatrics pulmonarymanifestationsofgeneraldiseases radiography respiratory respiratorydistresssyndrome respiratoryorgans respiratorytherapyforchildren respiratorytherapyfornewborninfants respiratorytractdiseases signsandsymptoms sleepdisordersinchildren sleepwakedisorders thoracic ws17w584p1980 ws280p98252009 ws280r43452009