MeSH
Ambulatory Care; Bronchitis, Chronic /drug therapy; Bronchodilator Agents /economics /therapeutic use; Cost-Benefit Analysis; Drug Therapy, Combination; Health Services /economics; Hospitalization /economics; Humans; Infant, Newborn; Pulmonary Disease, Chronic Obstructive /drug therapy; Pulmonary Emphysema /drug therapy; Respiratory Function Tests