1. Birth history, including prematurity or respiratory distress syndrome.
2. Respiratory syncytial virus in infancy.
3. Growth velocity.
4. Previous episodes of coughing spells and response to bron-chodilators, antihistamine, or antacids.
III. Differential Diagnosis. Cough receptors are present throughout respiratory tract from upper airway (nose, pharynx) to terminal bronchioles. Stimulation of these receptors can occur from an array of sites, including ear, diaphragm, pericardium, and stomach.
A. Ear. Foreign body or impacted cerumen.
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