Costs and effectiveness of spacer versus nebulizer in young children with moderate and severe acute asthma
The Journal of Pediatrics (2000) - Comments
pubmed: 10753248  issn: 0022-3476  doi: 10.1016/s0022-3476(00)90013-1 

Alison M. Leversha, Silvana G. Campanella, Richard P. Aickin, M.Innes Asher