β-agonists through metered-dose inhaler with valved holding chamber versus nebulizer for acute exacerbation of wheezing or asthma in children under 5 years of age: A systematic review with meta-analysis
From the Pediatric Pulmonary Section, Department of Pediatrics, School of Medicine, University of Chile, Santiago, Chile; and the Emergency Department, Hospital Central de las Fuerzas Armadas, Montevideo, Uruguay
Received 19 September 2003; received in revised form 20 November 2003; accepted 2 April 2004.
See editorial, p 151.
PII: S0022-3476(04)00283-5
doi:10.1016/j.jpeds.2004.04.007
© 2004 Elsevier Inc. All rights reserved.
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