Infants 12 months of age or younger were *included* in the RBEL study if they had severe bronchiolitis requiring emergency department care or hospitalization, a positive nasopharyngeal swab confirming RSV infection, and physician-documented wheezing during acute illness. *Exclusion* criteria included a history of previous wheezing and/or diagnosis of asthma, congenital abnormalities of the heart and lung, cystic fibrosis diagnosed in the patient or immediate family, regular use of anti-gastroesophageal reflux medication, bronchodilators, or anti-inflammatory medications.
Item
Infants 12 months of age or younger were *included* in the RBEL study if they had severe bronchiolitis requiring emergency department care or hospitalization, a positive nasopharyngeal swab confirming RSV infection, and physician-documented wheezing during acute illness. *Exclusion* criteria included a history of previous wheezing and/or diagnosis of asthma, congenital abnormalities of the heart and lung, cystic fibrosis diagnosed in the patient or immediate family, regular use of anti-gastroesophageal reflux medication, bronchodilators, or anti-inflammatory medications.
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