TY  - GEN
AU  - Robertson,D G
TI  - Universal spacer devices
SN  - 0140-6736
PY  - 1994///0316
KW  - Asthma
KW  - drug therapy
KW  - Child
KW  - Equipment Design
KW  - Humans
KW  - Infant
KW  - Nebulizers and Vaporizers
N1  - Publication Type: Comment; Letter
UR  - https://doi.org/10.1016/s0140-6736(94)92724-3
ER  -