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APA Citation
Zar, H. J., Streun, S., Levin, M., Weinberg, E. G., & Swingler, G. H. (2007). randomised controlled trial of the efficacy of a metered dose inhaler with bottle spacer for bronchodilator treatment in acute lower airway obstruction. Archives of disease in childhood, 92(2), 142–146. http://access.bl.uk/ark:/81055/vdc_100135173788.0x000055